DTD Tree structure of MARC mrcaxmlfile DTD

DTD Tree structure of MARC mrcaxmlfile DTD generated using Matra

DTD Name: MARC Authority/Classification Record XML DTD
DTD Location: ftp://ftp.loc.gov/pub/marcdtd/mrcaxmlfile.dtd [cached copy]
DTD Version: February 19, 2004

DTD-Tree [How to read it?] [Notes on the dtdtree]

mrca682-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")

mrca764-8 (name=="Field link and sequence number", obsolete=="no", repeatable=="yes")

mrca764-6 (name=="Linkage", obsolete=="no", repeatable=="no")

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")
   |  |
   |  |- 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")
   |  |  |
   |