DTD Tree structure of MARC mrcaxmlfile DTD generated using Matra 0.8b

DTD Name: MARC Authority/Classification Record XML DTD
DTD Location: ftp://ftp.loc.gov/pub/marcdtd/mrcaxmlfile.dtd [cached copy]
DTD Version: May 5, 2004

DTD-Tree [How to read it?]

mrcafile
|
+- mrca+ (format-type)
   |
   |- mrcaldr-ad
   |  |
   |  |= mrcaldr-ad-05 (name=="Record Status", obsolete=="no", value)
   |  |
   |  |= mrcaldr-ad-06 (name=="Type of record", obsolete=="no", value)
   |  |
   |  |= mrcaldr-ad-07 (name=="Undefined", obsolete=="no", value="fill")
   |  |
   |  |= mrcaldr-ad-08 (name=="Undefined", obsolete=="no", value="fill")
   |  |
   |  |= mrcaldr-ad-09 (name=="Character coding scheme", obsolete=="no", value)
   |  |
   |  |= mrcaldr-ad-17 (name=="Encoding level", obsolete=="no", value)
   |  |
   |  |= mrcaldr-ad-18 (name=="Undefined", obsolete=="no", value="fill")
   |  |
   |  += mrcaldr-ad-19 (name=="Undefined", obsolete=="no", value="fill")
   |
   |- mrcaldr-cd
   |  |
   |  |= mrcaldr-cd-05 (name=="Record Status", obsolete=="no", value)
   |  |
   |  |= mrcaldr-cd-06 (name=="Type of record", obsolete=="no", value)
   |  |
   |  |= mrcaldr-cd-07 (name=="Undefined", obsolete=="no", value="fill")
   |  |
   |  |= mrcaldr-cd-08 (name=="Undefined", obsolete=="no", value="fill")
   |  |
   |  |= mrcaldr-cd-09 (name=="Character coding scheme", obsolete=="no", value)
   |  |
   |  |= mrcaldr-cd-17 (name=="Encoding level", obsolete=="no", value)
   |  |
   |  |= mrcaldr-cd-18 (name=="Undefined", obsolete=="no", value="fill")
   |  |
   |  += mrcaldr-cd-19 (name=="Undefined", obsolete=="no", value="fill")
   |
   |- mrca-control-fields?
   |  |
   |  |- mrca001?
   |  |
   |  |- mrca003?
   |  |
   |  |- mrca005?
   |  |
   |  |- mrca008-ad
   |  |  |
   |  |  |= mrca008-ad-00-05 (name=="Date entered on file", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-06 (name=="Direct or indirect geographic subdivision", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-07 (name=="Romanization scheme", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-08 (name=="Language of catalog", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-09 (name=="Kind of record", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-10 (name=="Descriptive cataloging rules", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-11 (name=="Subject heading system/thesaurus", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-12 (name=="Type of series", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-13 (name=="Numbered or unnumbered series", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-14 (name=="Heading use--main or added entry", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-15 (name=="Heading use--subject added entry", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-16 (name=="Heading use--series added entry", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-17 (name=="Type of subject subdivision", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-18-27 (name=="Undefined", obsolete=="no", value="fill")
   |  |  |
   |  |  |= mrca008-ad-28 (name=="Type of government agency", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-29 (name=="Reference evaluation", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-30 (name=="Undefined", obsolete=="no", value="fill")
   |  |  |
   |  |  |= mrca008-ad-31 (name=="Record update in process", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-32 (name=="Undifferentiated personal name", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-33 (name=="Level of establishment", obsolete=="no", value)
   |  |  |
   |  |  |= mrca008-ad-34-37 (name=="Language of heading code", obsolete=="yes", value)
   |  |  |
   |  |  |= mrca008-ad-38 (name=="Modified record", obsolete=="no", value)
   |  |  |
   |  |  += mrca008-ad-39 (name=="Cataloging source", obsolete=="no", value)
   |  |
   |  +- mrca008-cd
   |     |
   |     |= mrca008-cd-00-05 (name=="Date entered on file", obsolete=="no", value)
   |     |
   |     |= mrca008-cd-06 (name=="Kind of record", obsolete=="no", value)
   |     |
   |     |= mrca008-cd-07 (name=="Type of number", obsolete=="no", value)
   |     |
   |     |= mrca008-cd-08 (name=="Classification validity", obsolete=="no", value)
   |     |
   |     |= mrca008-cd-09 (name=="Standard or optional designation", obsolete=="no", value)
   |     |
   |     |= mrca008-cd-10 (name=="Record update in process", obsolete=="no", value)
   |     |
   |     |= mrca008-cd-11 (name=="Level of establishment", obsolete=="no", value)
   |     |
   |     |= mrca008-cd-12 (name=="Synthesized number indication", obsolete=="no", value)
   |     |
   |     += mrca008-cd-13 (name=="Display controller", obsolete=="no", value)
   |
   |- mrca-numbers-and-codes? (name=="01X-08X Numbers and Codes")
   |  |
   |  |- mrca010? (name=="LIBRARY OF CONGRESS CONTROL NUMBER", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca010-a (name=="LC control number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca010-z (name=="Canceled/invalid LC control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  +- mrca010-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca014* (name=="LINK TO BIBLIOGRAPHIC RECORD FOR SERIAL OR MULTIPART ITEM", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca014-a (name=="Control number of related bibliographic record", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca014-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca014-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca016* (name=="National Bibliographic Agency Control Number", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca016-a (name=="Record control number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca016-z (name=="Canceled/invalid record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca016-2 (name=="Source", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca016-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca020* (name=="INTERNATIONAL STANDARD BOOK NUMBER", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca020-a (name=="International Standard Book Number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca020-c (name=="Terms of availability", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca020-z (name=="Canceled/invalid ISBN", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca020-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca020-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca022* (name=="INTERNATIONAL STANDARD SERIAL NUMBER", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca022-a (name=="International Standard Serial Number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca022-y (name=="Incorrect ISSN", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca022-z (name=="Canceled ISSN", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca022-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca022-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca024* (name=="OTHER STANDARD IDENTIFIER", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca024-a (name=="Standard number or code", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca024-c (name=="Terms of availability", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca024-d (name=="Additional codes following the standard number or code", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca024-z (name=="Canceled/invalid standard number or code", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca024-2 (name=="Source of number or code", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca024-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca024-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca035* (name=="SYSTEM CONTROL NUMBER", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca035-a (name=="System control number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca035-z (name=="Canceled/invalid control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca035-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca035-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca040? (name=="CATALOGING SOURCE", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca040-a (name=="Original cataloging agency", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca040-b (name=="Language of cataloging", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca040-c (name=="Transcribing agency", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca040-d (name=="Modifying agency", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca040-e (name=="Description conventions", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca040-f (name=="Subject heading or thesaurus conventions", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca040-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca040-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca042? (name=="AUTHENTICATION CODE", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  +- mrca042-a (name=="Authentication code", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca043? (name=="GEOGRAPHIC AREA CODE", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca043-a (name=="Geographic area code", obsolete=="no", repeatable=="yes", name=="Source of local code", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca043-b (name=="Local GAC code", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca043-c (name=="ISO code", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca043-2
   |  |  |
   |  |  |- mrca043-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca043-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca045? (name=="TIME PERIOD OF HEADING", obsolete=="no", repeatable=="no", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca045-a (name=="Time period code", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca045-b (name=="Formatted 9999 B.C. through C.E. time period", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca045-c (name=="Formatted pre-9999 B.C. time period", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca045-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca045-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca050* (name=="LIBRARY OF CONGRESS CALL NUMBER", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca050-a (name=="Classification number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca050-b (name=="Item number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca050-d (name=="Volumes/dates to which call number applies", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca050-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca050-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca050-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca052* (name=="GEOGRAPHIC CLASSIFICATION CODE", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca052-a (name=="Geographic classification area code", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca052-b (name=="Geographic classification subarea code", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca052-d (name=="Populated place name", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca052-2 (name=="Code source", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca052-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca052-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca053* (name=="LC CLASSIFICATION NUMBER", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca053-a (name=="Classification number element-single number or beginning number of span", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca053-b (name=="Classification number element-ending number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca053-c (name=="Explanatory term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca053-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca053-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca053-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca055* (name=="NATIONAL LIBRARY OF CANADA CALL NUMBER", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca055-a (name=="Classification number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca055-b (name=="Item number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca055-d (name=="Volumes/dates to which call number applies", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca055-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca055-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca055-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca060* (name=="NATIONAL LIBRARY OF MEDICINE CALL NUMBER", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca060-a (name=="Classification number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca060-b (name=="Item number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca060-d (name=="Volumes/dates to which call number applies", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca060-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca060-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca060-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca065* (name=="OTHER CLASSIFICATION NUMBER", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca065-a (name=="Classification number element–single number or beginning of span", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca065-b (name=="Classification number element–ending number of span ", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca065-c (name=="Explanatory term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca065-2 (name=="Number source", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca065-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca065-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca065-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca066? (name=="CHARACTER SETS PRESENT", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca066-a (name=="Primary G0 character set", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca066-b (name=="Primary G1 character set", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca066-c (name=="Alternate G0 or G1 character set", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca070* (name=="NATIONAL AGRICULTURAL LIBRARY CALL NUMBER", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca070-a (name=="Classification number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca070-b (name=="Item number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca070-d (name=="Volume/dates to which call number applies", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca070-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca070-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca072* (name=="SUBJECT CATEGORY CODE", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca072-a (name=="Subject category code", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca072-x (name=="Subject category code subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca072-2 (name=="Code source", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca072-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca072-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca073? (name=="SUBDIVISION USAGE", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca073-a (name=="Subdivision usage", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca073-z (name=="Code source", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca073-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca073-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca082* (name=="DEWEY DECIMAL CALL NUMBER", obsolete=="no", repeatable=="yes", i1, i2)
   |  |  |
   |  |  |- mrca082-a (name=="Classification number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca082-b (name=="Item number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca082-d (name=="Volumes/dates to which call number applies", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca082-2 (name=="Edition number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca082-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca082-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca082-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca083* (name=="DEWEY DECIMAL CLASSIFICATION NUMBER", obsolete=="no", repeatable=="yes", i1, i2)
   |  |  |
   |  |  |- mrca083-a (name=="Classification number element-single number or beginning number of span", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca083-b (name=="Classification number element-ending number of span", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca083-c (name=="Explanatory term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca083-z (name=="Table identification-table number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca083-2 (name=="Edition number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca083-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca083-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca083-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca084? (name=="CLASSIFICATION SCHEME AND EDITION", obsolete=="no", repeatable=="no", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca084-a (name=="Classification scheme code", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca084-b (name=="Edition title", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca084-c (name=="Edition identifier", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca084-d (name=="Source edition identifier", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca084-e (name=="Language code", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca084-f (name=="Authorization", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca084-n (name=="Variations", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca084-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca084-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca086* (name=="GOVERNMENT DOCUMENT CALL NUMBER", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca086-a (name=="Call number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca086-d (name=="Volumes/dates to which call number applies", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca086-z (name=="Cancelled/invalid call number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca086-2 (name=="Number source", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca086-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca086-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca086-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  +- mrca087* (name=="GOVERNMENT DOCUMENT CLASSIFICATION NUMBER", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |     |
   |     |- mrca087-a (name=="Classification number element-Single number or beginning number of span", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca087-b (name=="Classification number element-Ending number of span", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca087-c (name=="Explanatory information", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca087-2 (name=="Number source", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca087-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |     |
   |     +- mrca087-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |
   |- mrca-headings?
   |  |
   |  |- mrca100? (name=="HEADING-PERSONAL NAME", obsolete=="no", repeatable=="no", i1, i2)
   |  |  |
   |  |  |- mrca100-a (name=="Personal name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca100-b (name=="Numeration", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca100-c (name=="Titles and other words associated with a name", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca100-d (name=="Dates associated with a name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca100-e (name=="Relator term", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca100-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca100-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca100-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca100-j (name=="Attribution qualifier", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca100-k (name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca100-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca100-m (name=="Medium of performance for music", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca100-n (name=="Number of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca100-o (name=="Arranged statement for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca100-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca100-q (name=="Fuller form of name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca100-r (name=="Key for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca100-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca100-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca100-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca100-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca100-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca100-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca100-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca100-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca110? (name=="HEADING-CORPORATE NAME", obsolete=="no", repeatable=="no", i1, i2)
   |  |  |
   |  |  |- mrca110-a (name=="Corporate name or jurisdiction name as entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca110-b (name=="Subordinate unit", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca110-c (name=="Location of meeting", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca110-d (name=="Date of meeting or treaty signing", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca110-e (name=="Relator term", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca110-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca110-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca110-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca110-k (name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca110-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca110-m (name=="Medium of performance for music", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca110-n (name=="Number of part/section/meeting", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca110-o (name=="Arranged statement for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca110-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca110-r (name=="Key for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca110-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca110-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca110-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca110-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca110-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca110-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca110-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca110-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca111? (name=="HEADING-MEETING NAME", obsolete=="no", repeatable=="no", i1, i2)
   |  |  |
   |  |  |- mrca111-a (name=="Meeting name or jurisdiction name as entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca111-b (name=="Number", obsolete=="yes", repeatable=="no")
   |  |  |
   |  |  |- mrca111-c (name=="Location of meeting", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca111-d (name=="Date of meeting", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca111-e (name=="Subordinate unit", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca111-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca111-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca111-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca111-k (name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca111-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca111-n (name=="Number of part/section/meeting", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca111-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca111-q (name=="Name of meeting following jurisdiction name entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca111-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca111-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca111-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca111-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca111-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca111-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca111-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca111-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca130? (name=="HEADING-UNIFORM TITLE", obsolete=="no", repeatable=="no", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca130-a (name=="Uniform title", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca130-d (name=="Date of treaty signing", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca130-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca130-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca130-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca130-k (name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca130-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca130-m (name=="Medium of performance for music", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca130-n (name=="Number of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca130-o (name=="Arranged statement for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca130-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca130-r (name=="Key for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca130-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca130-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca130-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca130-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca130-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca130-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca130-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca130-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca148? (name=="HEADING-CHRONOLOGICAL TERM", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca148-a (name=="Chronological term ", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca148-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca148-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca148-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca148-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca148-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca148-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca150? (name=="HEADING-TOPICAL TERM", obsolete=="no", repeatable=="no", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca150-a (name=="Topical term or geographic name as entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca150-b (name=="Topical term following geographic name as entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca150-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca150-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca150-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca150-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca150-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca150-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca151? (name=="HEADING-GEOGRAPHIC NAME", obsolete=="no", repeatable=="no", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca151-a (name=="Geographic name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca151-b (name=="Name following place as entry element", obsolete=="yes", repeatable=="no")
   |  |  |
   |  |  |- mrca151-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca151-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca151-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca151-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca151-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca151-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca153? (name=="CLASSIFICATION NUMBER", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca153-a (name=="Classification number-Single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca153-c (name=="Classification number-Ending number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca153-h (name=="Caption hierarchy", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca153-j (name=="Caption", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca153-k (name=="Summary number span caption hierarchy", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca153-y (name=="Table identification-schedule", obsolete=="yes", repeatable=="no")
   |  |  |
   |  |  |- mrca153-z (name=="Table identification", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca153-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca153-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca154? (name=="GENERAL EXPLANATORY INDEX TERM", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca154-a (name=="General explanatory index term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca154-b (name=="General explanatory index term-succeeding level", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca154-f (name=="Schedule identification", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca154-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca154-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca155? (name=="HEADING-GENRE/FORM TERM", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca155-a (name=="Genre/form term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca155-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca155-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca155-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca155-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca155-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca155-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca180? (name=="HEADING-GENERAL SUBDIVISION", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca180-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca180-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca180-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca180-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca180-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca180-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca181? (name=="HEADING-GEOGRAPHIC SUBDIVISION", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca181-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca181-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca181-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca181-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca181-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca181-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca182? (name=="HEADING-CHRONOLOGICAL SUBDIVISION", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca182-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca182-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca182-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca182-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca182-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca182-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  +- mrca185? (name=="HEADING-FORM SUBDIVISION", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |     |
   |     |- mrca185-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca185-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca185-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca185-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca185-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |     |
   |     +- mrca185-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |
   |- mrca-complex-see-refs? (name=="Complex See References")
   |  |
   |  |- mrca253* (name=="COMPLEX SEE REFERENCE", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca253-a (name=="Classification number referred to-single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca253-c (name=="Classification number referred to-ending number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca253-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca253-y (name=="Table identification-schedule", obsolete=="yes", repeatable=="no")
   |  |  |
   |  |  |- mrca253-z (name=="Table identification", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca253-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca253-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  +- mrca260* (name=="COMPLEX SEE REFERENCE-SUBJECT", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |     |
   |     |- mrca260-a (name=="Heading referred to", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca260-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca260-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |     |
   |     +- mrca260-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |
   |- mrca-complex-see-also-refs? (name=="Complex See Also References")
   |  |
   |  |- mrca353* (name=="COMPLEX SEE ALSO REFERENCE", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca353-a (name=="Classification number referred to-single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca353-c (name=="Classification number referred to-ending number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca353-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca353-y (name=="Table identification-schedule", obsolete=="yes", repeatable=="no")
   |  |  |
   |  |  |- mrca353-z (name=="Table identification", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca353-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca353-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  +- mrca360* (name=="COMPLEX SEE ALSO REFERENCE-SUBJECT", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |     |
   |     |- mrca360-a (name=="Heading referred to", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca360-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca360-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |     |
   |     +- mrca360-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |
   |- mrca-see-tracings? (name=="4XX  See Tracings")
   |  |
   |  |- mrca400* (name=="SEE FROM TRACING-PERSONAL NAME", obsolete=="no", repeatable=="yes", i1, i2)
   |  |  |
   |  |  |- mrca400-a (name=="Personal name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca400-b (name=="Numeration", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca400-c (name=="Titles and other words associated with a name", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca400-d (name=="Dates associated with a name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca400-e (name=="Relator term", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca400-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca400-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca400-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca400-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca400-j (name=="Attribution qualifier", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca400-k (name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca400-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca400-m (name=="Medium of performance for music", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca400-n (name=="Number of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca400-o (name=="Arranged statement for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca400-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca400-q (name=="Fuller form of name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca400-r (name=="Key for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca400-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca400-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca400-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca400-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca400-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca400-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca400-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca400-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca400-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca400-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca410* (name=="SEE FROM TRACING-CORPORATE NAME", obsolete=="no", repeatable=="yes", i1, i2)
   |  |  |
   |  |  |- mrca410-a (name=="Corporate name or jurisdiction name as entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca410-b (name=="Subordinate unit", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca410-c (name=="Location of meeting", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca410-d (name=="Date of meeting or treaty signing", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca410-e (name=="Relator term", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca410-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca410-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca410-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca410-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca410-k (name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca410-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca410-m (name=="Medium of performance for music", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca410-n (name=="Number of part/section/meeting", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca410-o (name=="Arranged statement for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca410-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca410-r (name=="Key for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca410-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca410-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca410-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca410-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca410-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca410-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca410-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca410-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca410-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca410-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca411* (name=="SEE FROM TRACING-MEETING NAME", obsolete=="no", repeatable=="yes", i1, i2)
   |  |  |
   |  |  |- mrca411-a (name=="Meeting name or jurisdiction name as entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca411-b (name=="Number", obsolete=="yes", repeatable=="no")
   |  |  |
   |  |  |- mrca411-c (name=="Location of meeting", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca411-d (name=="Date of meeting", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca411-e (name=="Subordinate unit", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca411-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca411-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca411-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca411-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca411-k (name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca411-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca411-n (name=="Number of part/section/meeting", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca411-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca411-q (name=="Name of meeting following jurisdiction name entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca411-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca411-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca411-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca411-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca411-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca411-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca411-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca411-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca411-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca411-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca430* (name=="SEE FROM TRACING-UNIFORM TITLE", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca430-a (name=="Uniform title", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca430-d (name=="Date of treaty signing", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca430-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca430-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca430-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca430-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca430-k (name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca430-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca430-m (name=="Medium of performance for music", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca430-n (name=="Number of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca430-o (name=="Arranged statement for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca430-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca430-r (name=="Key for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca430-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca430-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca430-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca430-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca430-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca430-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca430-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca430-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca430-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca430-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca448* (name=="SEE FROM TRACING--CHRONOLOGICAL TERM", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca448-a (name=="Chronological term ", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca448-i (name=="Reference instruction phrase ", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca448-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca448-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca448-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca448-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca448-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca448-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca448-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca448-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca450* (name=="SEE FROM TRACING-TOPICAL TERM", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca450-a (name=="Topical term or geographic name entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca450-b (name=="Topical term following geographic name entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca450-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca450-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca450-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca450-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca450-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca450-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca450-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca450-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca450-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca451* (name=="SEE FROM TRACING-GEOGRAPHIC NAME", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca451-a (name=="Geographic name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca451-b (name=="Name following place as entry element", obsolete=="yes", repeatable=="no")
   |  |  |
   |  |  |- mrca451-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca451-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca451-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca451-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca451-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca451-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca451-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca451-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca451-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca453* (name=="INVALID NUMBER TRACING", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca453-a (name=="Classification number-Single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca453-c (name=="Classification element-Ending number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca453-h (name=="Caption hierarchy", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca453-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca453-j (name=="Caption", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca453-k (name=="Summary number span caption hierarchy", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca453-t (name=="Topic", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca453-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca453-y (name=="Table identification-schedule", obsolete=="yes", repeatable=="no")
   |  |  |
   |  |  |- mrca453-z (name=="Table identification", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca453-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca453-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca455* (name=="SEE FROM TRACING-GENRE/FORM TERM", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca455-a (name=="Genre/form term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca455-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca455-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca455-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca455-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca455-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca455-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca455-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca455-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca455-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca480* (name=="SEE FROM TRACING-GENERAL SUBDIVISION", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca480-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca480-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca480-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca480-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca480-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca480-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca480-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca480-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca480-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca481* (name=="SEE FROM TRACING-GEOGRAPHIC SUBDIVISION", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca481-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca481-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca481-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca481-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca481-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca481-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca481-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca481-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca481-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca482* (name=="SEE FROM TRACING-CHRONOLOGICAL SUBDIVISION", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca482-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca482-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca482-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca482-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca482-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca482-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca482-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca482-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca482-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  +- mrca485* (name=="SEE FROM TRACING-FORM SUBDIVISION", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |     |
   |     |- mrca485-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca485-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca485-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca485-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca485-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca485-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca485-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca485-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |     |
   |     +- mrca485-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |
   |- mrca-see-also-tracings? (name=="5XX  See Also Tracings")
   |  |
   |  |- mrca500* (name=="SEE ALSO FROM TRACING-PERSONAL NAME", obsolete=="no", repeatable=="yes", i1, i2)
   |  |  |
   |  |  |- mrca500-a (name=="Personal name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca500-b (name=="Numeration", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca500-c (name=="Titles and other words associated with a name", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca500-d (name=="Dates associated with a name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca500-e (name=="Relator term", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca500-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca500-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca500-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca500-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca500-j (name=="Attribution qualifier", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca500-k (name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca500-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca500-m (name=="Medium of performance for music", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca500-n (name=="Number of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca500-o (name=="Arranged statement for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca500-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca500-q (name=="Fuller form of name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca500-r (name=="Key for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca500-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca500-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca500-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca500-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca500-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca500-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca500-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca500-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca500-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca500-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca500-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca510* (name=="SEE ALSO FROM TRACING-CORPORATE NAME", obsolete=="no", repeatable=="yes", i1, i2)
   |  |  |
   |  |  |- mrca510-a (name=="Corporate name or jurisdiction name as entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca510-b (name=="Subordinate unit", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca510-c (name=="Location of meeting", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca510-d (name=="Date of meeting or treaty signing", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca510-e (name=="Relator term", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca510-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca510-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca510-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca510-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca510-k (name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca510-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca510-m (name=="Medium of performance for music", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca510-n (name=="Number of part/section/meeting", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca510-o (name=="Arranged statement for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca510-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca510-r (name=="Key for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca510-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca510-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca510-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca510-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca510-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca510-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca510-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca510-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca510-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca510-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca510-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca511* (name=="SEE ALSO FROM TRACING-MEETING NAME", obsolete=="no", repeatable=="yes", i1, i2)
   |  |  |
   |  |  |- mrca511-a (name=="Meeting name or jurisdiction name as entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca511-b (name=="Number", obsolete=="yes", repeatable=="no")
   |  |  |
   |  |  |- mrca511-c (name=="Location of meeting", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca511-d (name=="Date of meeting", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca511-e (name=="Subordinate unit", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca511-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca511-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca511-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca511-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca511-k (name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca511-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca511-n (name=="Number of part/section/meeting", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca511-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca511-q (name=="Name of meeting following jurisdiction name entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca511-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca511-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca511-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca511-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca511-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca511-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca511-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca511-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca511-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca511-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca511-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca530* (name=="SEE ALSO FROM TRACING-UNIFORM TITLE", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca530-a (name=="Uniform title", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca530-d (name=="Date of treaty signing", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca530-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca530-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca530-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca530-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca530-k (name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca530-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca530-m (name=="Medium of performance for music", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca530-n (name=="Number of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca530-o (name=="Arranged statement for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca530-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca530-r (name=="Key for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca530-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca530-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca530-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca530-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca530-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca530-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca530-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca530-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca530-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca530-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca530-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca548* (name=="SEE ALSO FROM TRACING--CHRONOLOGICAL TERM", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca548-a (name=="Chronological term ", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca548-i (name=="Reference instruction phrase ", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca548-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca548-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca548-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca548-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca548-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca548-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca548-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca548-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca548-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca550* (name=="SEE ALSO FROM TRACING-TOPICAL TERM", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca550-a (name=="Topical term or geographic name entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca550-b (name=="Topical term following geographic name entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca550-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca550-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca550-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca550-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca550-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca550-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca550-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca550-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca550-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca550-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca551* (name=="SEE ALSO FROM TRACING-GEOGRAPHIC NAME", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca551-a (name=="Geographic name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca551-b (name=="Name following place as entry element", obsolete=="yes", repeatable=="no")
   |  |  |
   |  |  |- mrca551-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca551-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca551-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca551-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca551-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca551-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca551-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca551-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca551-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca551-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca553* (name=="VALID NUMBER TRACING", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca553-a (name=="Classification number-Single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca553-c (name=="Classification number-Ending number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca553-h (name=="Caption hierarchy", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca553-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca553-j (name=="Caption", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca553-k (name=="Summary number span caption hierarchy", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca553-t (name=="Topic", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca553-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca553-y (name=="Table identification-schedule", obsolete=="yes", repeatable=="no")
   |  |  |
   |  |  |- mrca553-z (name=="Table identification", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca553-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca553-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca555* (name=="SEE ALSO FROM TRACING-GENRE/FORM TERM", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca555-a (name=="Genre/form term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca555-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca555-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca555-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca555-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca555-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca555-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca555-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca555-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca555-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca555-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca580* (name=="SEE ALSO FROM TRACING-GENERAL SUBDIVISION", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca580-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca580-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca580-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca580-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca580-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca580-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca580-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca580-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca580-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca580-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca581* (name=="SEE ALSO FROM TRACING-GEOGRAPHIC SUBDIVISION", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca581-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca581-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca581-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca581-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca581-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca581-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca581-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca581-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca581-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca581-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca582* (name=="SEE ALSO FROM TRACING-CHRONOLOGICAL SUBDIVISION", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca582-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca582-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca582-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca582-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca582-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca582-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca582-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca582-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca582-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca582-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  +- mrca585* (name=="SEE ALSO FROM TRACING-FORM SUBDIVISION", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |     |
   |     |- mrca585-i (name=="Reference instruction phrase", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca585-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca585-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca585-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca585-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca585-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca585-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca585-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca585-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |     |
   |     +- mrca585-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |
   |- mrca-series-treatment?
   |  |
   |  |- mrca640* (name=="SERIES DATES OF PUBLICATION AND/OR SEQUENTIAL DESIGNATION", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca640-a (name=="Dates of publication and/or sequential designation", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca640-z (name=="Source of information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca640-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca640-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca641* (name=="SERIES NUMBERING PECULIARITIES", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca641-a (name=="Numbering peculiarities note", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca641-z (name=="Source of information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca641-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca641-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca642* (name=="SERIES NUMBERING EXAMPLE", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca642-a (name=="Series numbering example", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca642-d (name=="Volumes/dates to which series numbering example applies", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca642-5 (name=="Institution/copy to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca642-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca642-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca643* (name=="SERIES PLACE AND PUBLISHER/ISSUING BODY", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca643-a (name=="Place", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca643-b (name=="Publisher/issuing body", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca643-d (name=="Volumes/dates to which place and publisher/issuing body apply", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca643-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca643-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca644* (name=="SERIES ANALYSIS PRACTICE", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca644-a (name=="Series analysis practice", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca644-b (name=="Exceptions to analysis practice", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca644-d (name=="Volumes/dates to which analysis practice applies", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca644-5 (name=="Institution/copy to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca644-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca644-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca645* (name=="SERIES TRACING PRACTICE", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca645-a (name=="Series tracing practice", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca645-d (name=="Volumes/dates to which tracing practice applies", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca645-5 (name=="Institution/copy to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca645-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca645-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  +- mrca646* (name=="SERIES CLASSIFICATION PRACTICE", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |     |
   |     |- mrca646-a (name=="Series classification practice", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca646-d (name=="Volumes/dates to which classification practice applies", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca646-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca646-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |     |
   |     +- mrca646-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |
   |- mrca-refs-notes? (name=="References Notes")
   |  |
   |  |- mrca663? (name=="COMPLEX SEE ALSO REFERENCE-NAME", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca663-a (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca663-b (name=="Heading referred to", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca663-t (name=="Title referred to", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca663-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca663-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca664? (name=="COMPLEX SEE REFERENCE-NAME", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca664-a (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca664-b (name=="Heading referred to", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca664-t (name=="Title referred to", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca664-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca664-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca665? (name=="HISTORY REFERENCE", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca665-a (name=="History reference", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca665-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca665-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  +- mrca666? (name=="GENERAL EXPLANATORY REFERENCE-NAME", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |     |
   |     |- mrca666-a (name=="General explanatory reference", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca666-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |     |
   |     +- mrca666-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |
   |- mrca-other-notes?
   |  |
   |  |- mrca667* (name=="NONPUBLIC GENERAL NOTE", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca667-a (name=="Nonpublic general note", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca667-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca667-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca667-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca668* (name=="CHARACTERS IN NONROMAN ALPHABETS", obsolete=="yes", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  +- mrca668-a (name=="Characters in nonroman alphabet", obsolete=="no", repeatable=="no")
   |  |
   |  |- mrca670* (name=="SOURCE DATA FOUND", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca670-a (name=="Source citation", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca670-b (name=="Information found", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca670-u (name=="Uniform Resource Identifier", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca670-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca670-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca675? (name=="SOURCE DATA NOT FOUND", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca675-a (name=="Source citation", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca675-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca675-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca678? (name=="BIOGRAPHICAL OR HISTORICAL DATA", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca678-a (name=="Biographical or historical data", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca678-b (name=="Expansion", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca678-u (name=="Uniform Resource Identifier", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca678-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca678-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca680* (name=="PUBLIC GENERAL NOTE/SCOPE NOTE", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca680-a (name=="Heading or subdivision term/Classification number - Single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca680-c (name=="Classification number-nding number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca680-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca680-y (name=="Classification table identification-schedule", obsolete=="yes", repeatable=="yes")
   |  |  |
   |  |  |- mrca680-z (name=="Table identification", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca680-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca680-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca680-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca681* (name=="SUBJECT/CLASSIFICATION EXAMPLE TRACING NOTE", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca681-a (name=="Subject heading or subdivision term/ Classification number--Single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca681-c (name=="Classification number--ending number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca681-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca681-y (name=="Table identification--Schedule", obsolete=="yes", repeatable=="yes")
   |  |  |
   |  |  |- mrca681-z (name=="Table identification", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca681-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca681-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca682? (name=="DELETED HEADING INFORMATION", obsolete=="no", repeatable=="no", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca682-a (name=="Replacement heading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca682-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca682-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca682-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca683* (name=="APPLICATION INSTRUCTION NOTE", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca683-a (name=="Classification number-Single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca683-c (name=="Classification number-Ending number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca683-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca683-p (name=="Corresponding classification field", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca683-y (name=="Table identification-schedule", obsolete=="yes", repeatable=="yes")
   |  |  |
   |  |  |- mrca683-z (name=="Table identification", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca683-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca683-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca683-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="no")
   |  |
   |  |- mrca684* (name=="AUXILIARY INSTRUCTION NOTE", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca684-a (name=="Classification number-Single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca684-c (name=="Classification number-Ending number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca684-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca684-j (name=="Caption", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca684-y (name=="Table identification-Schedule", obsolete=="yes", repeatable=="yes")
   |  |  |
   |  |  |- mrca684-z (name=="Table identification", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca684-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca684-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca684-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="no")
   |  |
   |  |- mrca685* (name=="HISTORY NOTE", obsolete=="no", repeatable=="yes", i1, i2)
   |  |  |
   |  |  |- mrca685-a (name=="New number-single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca685-b (name=="Previous number-single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca685-c (name=="Classification number-ending number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca685-d (name=="Date of implementation of authoritative agency", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca685-e (name=="Local implementation date", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca685-f (name=="Title and publication date", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca685-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca685-t (name=="Topic", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca685-y (name=="Table identification-schedule", obsolete=="yes", repeatable=="yes")
   |  |  |
   |  |  |- mrca685-z (name=="Table identification", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca685-2 (name=="Edition number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca685-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca685-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca685-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="no")
   |  |
   |  |- mrca686* (name=="RELATIONSHIP TO SOURCE NOTE", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca686-a (name=="Number in edition described in field 084--Single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca686-b (name=="Number in primary source edition--Single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca686-c (name=="Ending number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca686-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca686-o (name=="Number where instructions are found--Single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca686-t (name=="Topic", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca686-z (name=="Table identification", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca686-2 (name=="Edition number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca686-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca686-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca686-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="no")
   |  |
   |  +- mrca688* (name=="APPLICATION HISTORY NOTE", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |     |
   |     |- mrca688-a (name=="Application history note", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca688-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca688-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |     |
   |     +- mrca688-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |
   |- mrca-est-head-link-entries?
   |  |
   |  |- mrca700* (name=="ESTABLISHED HEADING LINKING ENTRY/INDEX TERM-PERSONAL NAME", obsolete=="no", repeatable=="yes", i1, i2)
   |  |  |
   |  |  |- mrca700-a (name=="Personal name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca700-b (name=="Numeration", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca700-c (name=="Titles and other words associated with a name", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca700-d (name=="Dates associated with a name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca700-e (name=="Relator term", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca700-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca700-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca700-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca700-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca700-j
   |  |  |
   |  |  |- mrca700-k (name=="Attribution qualifier", obsolete=="no", repeatable=="yes", name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca700-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca700-m (name=="Medium of performance for music", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca700-n (name=="Number of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca700-o (name=="Arranged statement for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca700-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca700-q (name=="Fuller form of name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca700-r (name=="Key for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca700-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca700-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca700-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca700-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca700-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca700-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca700-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca700-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca700-2 (name=="Source of heading or term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca700-3 (name=="Materials specified", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca700-4 (name=="Relator code", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca700-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca700-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca700-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca710* (name=="ESTABLISHED HEADING LINKING ENTRY/INDEX TERM-CORPORATE NAME", obsolete=="no", repeatable=="yes", i1, i2)
   |  |  |
   |  |  |- mrca710-a (name=="Corporate name or jurisdiction name as entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca710-b (name=="Subordinate unit", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca710-c (name=="Location of meeting", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca710-d (name=="Date of meeting or treaty signing", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca710-e (name=="Relator term", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca710-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca710-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca710-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca710-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca710-k (name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca710-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca710-m (name=="Medium of performance for music", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca710-n (name=="Number of part/section/meeting", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca710-o (name=="Arranged statement for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca710-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca710-r (name=="Key for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca710-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca710-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca710-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca710-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca710-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca710-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca710-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca710-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca710-2 (name=="Source of heading or term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca710-3 (name=="Materials specified", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca710-4
   |  |  |
   |  |  |- mrca710-5 (name=="Relator code", obsolete=="no", repeatable=="yes", name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca710-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca710-8 (name=="Field link and field number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca711* (name=="ESTABLISHED HEADING LINKING ENTRY/INDEX TERM-MEETING NAME", obsolete=="no", repeatable=="yes", i1, i2)
   |  |  |
   |  |  |- mrca711-a (name=="Meeting name or jurisdiction name as entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca711-c (name=="Location of meeting", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca711-d (name=="Date of meeting or treating signing", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca711-e (name=="Subordinate unit", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca711-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca711-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca711-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca711-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca711-k (name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca711-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca711-n (name=="Number of part/section/meeting", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca711-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca711-q (name=="Name of meeting following jurisdiction name entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca711-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca711-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca711-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca711-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca711-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca711-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca711-z (name=="Geographic subdivision (R)", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca711-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca711-2 (name=="Source of heading or term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca711-3 (name=="Materials specified", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca711-4 (name=="Relator code", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca711-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca711-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca711-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca730* (name=="ESTABLISHED HEADING LINKING ENTRY/INDEX TERM-UNIFORM TITLE", obsolete=="no", repeatable=="yes", i1, i2)
   |  |  |
   |  |  |- mrca730-a (name=="Uniform title", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca730-d (name=="Date of treaty signing", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca730-f (name=="Date of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca730-g (name=="Miscellaneous information", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca730-h (name=="Medium", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca730-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca730-k (name=="Form subheading", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca730-l (name=="Language of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca730-m (name=="Medium of performance for music", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca730-n (name=="Number of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca730-o (name=="Arranged statement for music", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca730-p (name=="Name of part/section of a work", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca730-r (name=="Key for music", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca730-s (name=="Version", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca730-t (name=="Title of a work", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca730-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca730-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca730-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca730-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca730-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca730-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca730-2 (name=="Source of heading or term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca730-3 (name=="Materials specified", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca730-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca730-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca730-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca748* (name=="ESTABLISHED HEADING LINKING ENTRY--CHRONOLOGICAL TERM / INDEX TERM--CHRONOLOGICAL", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca748-a (name=="Chronological term ", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca748-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca748-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca748-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca748-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca748-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca748-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca748-2 (name=="Source of heading or term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca748-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca748-3 (name=="Materials specified", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca748-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca748-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca748-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca750* (name=="ESTABLISHED HEADING LINKING ENTRY/INDEX TERM-TOPICAL TERM", obsolete=="no", repeatable=="yes", i1, i2)
   |  |  |
   |  |  |- mrca750-a (name=="Topical term or geographic name as entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca750-b (name=="Topical term following geographic name as entry element", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca750-c (name=="Location of event", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca750-d (name=="Active date", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca750-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca750-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca750-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca750-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca750-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca750-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca750-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca750-2 (name=="Source of heading or term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca750-3 (name=="Materials specified", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca750-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca750-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca750-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca751* (name=="ESTABLISHED HEADING LINKING ENTRY/INDEX TERM-GEOGRAPHIC NAME", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca751-a (name=="Geographic name", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca751-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca751-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca751-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca751-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca751-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca751-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca751-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca751-2 (name=="Source of heading or term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca751-3 (name=="Materials specified", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca751-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca751-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca751-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca753* (name=="INDEX TERM-UNCONTROLLED", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca753-a (name=="Index term", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca753-b (name=="Index term-succeeding level", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca753-d (name=="Index term referred from", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca753-e (name=="Example class number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca753-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca753-s (name=="See also reference term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca753-t (name=="See also reference term-succeeding level", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca753-u (name=="Use reference term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca753-v (name=="Use reference term-succeeding level", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca753-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca753-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca754* (name=="INDEX TERM-FACETED TOPICAL TERMS", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca754-a (name=="Focus term", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca754-b (name=="Non-focus term", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca754-c (name=="Facet/hierarchy designation", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca754-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca754-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca754-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca754-2 (name=="Source of heading or term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca754-3 (name=="Material specified", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca754-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca754-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  +- mrca755* (name=="ESTABLISHED HEADING LINKING ENTRY-GENRE/FORM TERM", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |     |
   |     |- mrca755-a (name=="Genre/form term as entry element", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca755-u (name=="Record control number", obsolete=="yes", repeatable=="yes")
   |     |
   |     |- mrca755-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca755-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca755-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca755-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca755-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca755-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca755-2 (name=="Source of heading or term", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca755-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca755-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |     |
   |     +- mrca755-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |
   |- mrca-number-building-fields?
   |  |
   |  |- mrca761* (name=="ADD OR DIVIDE LIKE INSTRUCTIONS", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca761-a (name=="Number where instructions are found-Single number or beginnning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca761-b (name=="Base number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca761-c (name=="Classification number-Ending number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca761-d (name=="Divided like number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca761-e (name=="Example class number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca761-f (name=="Facet designator", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca761-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca761-n (name=="Negative example class number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca761-r (name=="Root number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca761-x (name=="Other classification number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca761-y (name=="Table identification-schedule", obsolete=="yes", repeatable=="yes")
   |  |  |
   |  |  |- mrca761-z (name=="Table identification", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca761-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca761-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="no")
   |  |
   |  |- mrca762* (name=="TABLE IDENTIFICATION", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca762-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca762-y (name=="Schedule", obsolete=="yes", repeatable=="yes")
   |  |  |
   |  |  |- mrca762-z (name=="Table number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca762-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca762-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca763* (name=="INTERNAL SUBARRANGEMENT OR ADD TABLE ENTRY", obsolete=="no", repeatable=="yes", i1, i2)
   |  |  |
   |  |  |- mrca763-a (name=="Classification number-Single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca763-b (name=="Base number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca763-c (name=="Classification number-Ending number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca763-d (name=="Divided like number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca763-e (name=="Example class number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca763-h (name=="Caption hierarchy", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca763-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca763-j (name=="Caption", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca763-k (name=="Summary number span caption hierarchy", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca763-m (name=="Manual note", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca763-n (name=="Number where instructions are found", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca763-p (name=="Corresponding classification field", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca763-r (name=="Root number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca763-s (name=="See reference", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca763-x (name=="Other classification number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca763-y (name=="Table identification-schedule", obsolete=="yes", repeatable=="yes")
   |  |  |
   |  |  |- mrca763-z (name=="Table identification", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca763-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca763-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="no")
   |  |
   |  |- mrca764* (name=="RULE IDENTIFICATION", obsolete=="no", repeatable=="yes", i1="i1-blank", i2="i2-blank")
   |  |  |
   |  |  |- mrca764-a (name=="Rule number", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca764-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca764-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca764-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca765* (name=="SYNTHESIZED NUMBER COMPONENTS", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |  |  |
   |  |  |- mrca765-a (name=="Number where instructions are found-Single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca765-b (name=="Base number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca765-c (name=="Number where instructions are found-Ending number of span", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca765-f (name=="Facet designator", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca765-r (name=="Root number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca765-s (name=="Digits added from classification number in schedule or external table", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca765-t (name=="Digits added from internal subarrangement or add table", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca765-u (name=="Number being analyzed", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca765-v (name=="Number in internal subarrangement or add table where instructions are found", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca765-w (name=="Table identification-internal subarrangement or add table", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca765-y (name=="Table identification-schedule", obsolete=="yes", repeatable=="yes")
   |  |  |
   |  |  |- mrca765-z (name=="Table identification", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca765-6 (name=="Linkage", obsolete=="yes", repeatable=="no")
   |  |  |
   |  |  +- mrca765-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  +- mrca768* (name=="CITATION AND PREFERENCE ORDER INSTRUCTIONS", obsolete=="no", repeatable=="yes", i1, i2="i2-blank")
   |     |
   |     |- mrca768-a (name=="Classification number-Single number or beginning number of span", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca768-c (name=="Classification number-Ending number of span", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca768-e (name=="Example class number", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca768-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca768-j (name=="Caption", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca768-n (name=="Negative example class number", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca768-t (name=="Topic used as example of citation and preference order instruction", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca768-x (name=="Exception to table of preference", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca768-z (name=="Table identification-Table number", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca768-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |     |
   |     +- mrca768-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="no")
   |
   |- mrca-subdiv-head-link-entries?
   |  |
   |  |- mrca780* (name=="SUBDIVISION LINKING ENTRY-GENERAL SUBDIVISION", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca780-u (name=="Record control number", obsolete=="yes", repeatable=="yes")
   |  |  |
   |  |  |- mrca780-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca780-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca780-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca780-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca780-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca780-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca780-2 (name=="Source of heading or term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca780-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca780-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca780-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca781* (name=="SUBDIVISION LINKING ENTRY-GEOGRAPHIC SUBDIVISION", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca781-u (name=="Record control number", obsolete=="yes", repeatable=="yes")
   |  |  |
   |  |  |- mrca781-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca781-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca781-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca781-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca781-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca781-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca781-2 (name=="Source of heading or term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca781-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca781-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca781-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca782* (name=="SUBDIVISION LINKING ENTRY-CHRONOLOGICAL SUBDIVISION", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca782-u (name=="Record control number", obsolete=="yes", repeatable=="yes")
   |  |  |
   |  |  |- mrca782-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca782-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca782-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca782-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca782-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca782-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca782-2 (name=="Source of heading or term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca782-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca782-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca782-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  |- mrca785* (name=="SUBDIVISION LINKING ENTRY-FORM SUBDIVISION", obsolete=="no", repeatable=="yes", i1="i1-blank", i2)
   |  |  |
   |  |  |- mrca785-u (name=="Record control number", obsolete=="yes", repeatable=="yes")
   |  |  |
   |  |  |- mrca785-v (name=="Form subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca785-w (name=="Control subfield", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca785-x (name=="General subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca785-y (name=="Chronological subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca785-z (name=="Geographic subdivision", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca785-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca785-2 (name=="Source of heading or term", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  |- mrca785-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |  |  |
   |  |  |- mrca785-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |  |  |
   |  |  +- mrca785-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |  |
   |  +- mrca788? (name=="COMPLEX LINKING ENTRY DATA", obsolete=="no", repeatable=="no", i1="i1-blank", i2)
   |     |
   |     |- mrca788-a (name=="Heading referred to", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca788-i (name=="Explanatory text", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca788-0 (name=="Record control number", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca788-2 (name=="Source of heading or term", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca788-5 (name=="Institution to which field applies", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca788-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |     |
   |     +- mrca788-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |
   |- mrca-location?
   |  |
   |  +- mrca856* (name=="ELECTRONIC LOCATION AND ACCESS", obsolete=="no", repeatable=="yes", i1, i2)
   |     |
   |     |- mrca856-a (name=="Host name", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca856-b (name=="Access number", obsolete=="yes", repeatable=="no")
   |     |
   |     |- mrca856-c (name=="Compression information", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca856-d (name=="Path", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca856-f (name=="Electronic name", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca856-g (name=="Uniform Resource Locator", obsolete=="yes", repeatable=="yes")
   |     |
   |     |- mrca856-h (name=="Processor of request", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca856-i (name=="Instruction", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca856-j (name=="Bits per second", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca856-k (name=="Password", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca856-l (name=="Logon", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca856-m (name=="Contact for access assistance", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca856-n (name=="Name of location of host", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca856-o (name=="Operating system", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca856-p (name=="Port", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca856-q (name=="Electronic format type", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca856-r (name=="Settings", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca856-s (name=="File size", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca856-t (name=="Terminal emulation", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca856-u (name=="Uniform Resource Identifier", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca856-v (name=="Hours access method available", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca856-w (name=="Record control number", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca856-x (name=="Nonpublic note", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca856-y (name=="Link text", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca856-z (name=="Public note", obsolete=="no", repeatable=="yes")
   |     |
   |     |- mrca856-2 (name=="Access method", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca856-3 (name=="Materials specified", obsolete=="no", repeatable=="no")
   |     |
   |     |- mrca856-6 (name=="Linkage", obsolete=="no", repeatable=="no")
   |     |
   |     +- mrca856-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")
   |
   +- mrca-linkage?
      |
      +- mrca880* (name=="ALTERNATE GRAPHIC REPRESENTATION", obsolete=="no", repeatable=="yes", i1, i2)
         |
         |- mrca880-a (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-b (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-c (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-d (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-e (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-f (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-g (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-h (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-i (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-j (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-k (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-l (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-m (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-n (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-o (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-p (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-q (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-r (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-s (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-t (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-u (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-v (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-w (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-x (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-y (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-z (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-0 (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-1 (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-2 (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-3 (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-4 (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-5 (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-6 (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-7 (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         |- mrca880-8 (name=="Same as associated field", obsolete=="no", repeatable=="yes")
         |
         +- mrca880-9 (name=="Same as associated field", obsolete=="no", repeatable=="yes")

Tree representation of the MARC Authority/Classification Record XML DTD (mrcaxmlfile.dtd) - generated using Matra 0.8.1b (http://matra.sourceforge.net/)

How to read the above tree?

Please check the article How to read the DTD Tree to learn how to read the above dtd tree generated by the Matra DTD Parser.

About MARC

MARC stands for "MAchine Readable Cataloging". It was developed by the Library of Congress.

"The MARC formats are standards for the representation and communication of bibliographic and related information in machine-readable form."

About Matra

Matra is a java based XML DTD parser utility. It is available from http://matra.sourceforge.net. It is freely available under the open-source MPL 1.1 license.

Matra DTD Parser Utility at Sourceforge.