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Library of Congress indexes and indexed fields

About authority file indexing

  • How you specify the desired index varies with the search method you use. When searching from the basic search box, you must type the index label followed by a colon (:).
  • For searching, the fields below are indexed by individual word.

Library of Congress numeric indexes

Index (label) MARC Fields Indexed MARC Subfields Indexed
Agency Control Number (nba:) 016 a
Control Number
(ar:)
001  
019  
ISBN (bn:) 020 a z
ISSN
(in:)
022 a y z
ISSN-L
(ik:)
(ISSN Link)
022 l m
LCCN (ln:) 010 a z
667 a
 Note: Indexing field 667 helps catalogers identify the history of personal names previously in undifferentiated authority records and subsequently established as separate authority records, using unique control records with 667 fields that contain the word "undifferentiated." No textual data in the 667 field is indexed. The system does not compare or verify the LCCNs in field 667 with LCCNs in field 010.

Library of Congress text indexes

Index (label) MARC Fields Indexed MARC Subfields Indexed
Cartographic Data (cm:) 034 d e f g z
Cataloging Source (cs:) 040 a c d
Children's Subject (sj:) 046 f g k l q r
100, 110, 111, 130, 150, 151 a b c d e f g h j k l m n o p q r s t v x y z
400, 410, 411, 430, 450, 451 a b c d e f g h j k l m n o p q r s t v x y z
500, 510, 511, 530, 550, 551 a b c d e f g h j k l m n o p q r s t v x y z
Children's Subject Phrase (sj=) 100, 110, 111, 130, 150, 151 a b c d e f g h j k l m n o p q r s t v x y z
400, 410, 411, 430, 450, 451 a b c d e f g h j k l m n o p q r s t v x y z
500, 510, 511, 530, 550, 551 a b c d e f g h j k l m n o p q r s t v x y z
Corporate/Conference Name (co:) 046 q r
110, 410, 510 a b c d e g i n
111, 411, 511 a c d e g i j n q
151, 451, 551 a
Corporate/Conference Name Phrase (co=) 110, 410, 510 a b c d e g i n
111, 411, 511 a c d e g i j n q
151, 451, 551 a
Descriptive Convention (dx:) 040 e
Entity Attributes (en:) 046 f g k l o p q r s t
368 a b c
370 a b c e f g s t
371 a b c d e m s t z
372, 373, 374, 375 a s t
376 a b c s t
377 a l
378 q
380, 381, 384, 388 a
382 a b d p v
383 a b c d e
385, 386 a b m n
Established Heading Linking Entry Phrase: $0 (ls0=) All 7xx fields $0 and its contents
Established Heading Linking Entry Phrase: Corporate/Conference (lcn=) 710 a b c d e g n
711 a c d e g j n q
Established Heading Linking Entry Phrase: Geographic Name (lge=) 751 a g v x y z
Established Heading Linking Entry Phrase: Personal Name (lpn=) 700 a b c d e g j q
Established Heading Linking Entry Phrase: Subdivision Linking Entry (lsb=) 780, 781, 782, 785 v x y z
Established Heading Linking Entry Phrase: Uniform Title (lti=) 730 a d f g h k l m n o p r s t
Genre (ge:) 155, 455, 555, 755 a v x y z
Genre Phrase (ge=) 155, 455, 555, 755 a v x y z
Geographic Name (gg:) 151, 451, 551 a g v x y z
181, 481, 581, 781 v x y z
Geographic Phrase (gn=) 151, 451, 551 a g v x y z
181, 481, 581, 781 v x y z
Keyword (kw:) All variable fields All subfields
Linking Entry: $0 Record Number (ls0:) All 7xx fields $0 and its contents
Linking Entry: Corporate/Conference Name (lcn:) 710 a b c d e g n
711 a c d e g j n q
Linking Entry: Geographic Name (lge:) 751 a g v x y z
Linking Entry: Personal Name (lpn:) 700 a b c d e g j q
Linking Entry: Uniform Title (lti:) 730 a d f g h k l m n o p r s t
Notes (nt:) 663 a b t 6 8
664 a b t
665, 666, 667, 675, 688 a
670, 678 a b u
680, 681, 682 a i
Personal Name (pn:) 046 f g
100, 400, 500 a b c d e g i j q
Personal Name Phrase (pn=) 100, 400, 500 a b c d e g i j q
Relationship (rx:) 100 e j
110 e
111 j
400, 500, 700 e i j 4
410, 510, 710 e i 4
411, 511, 711 i j 4
430, 450, 451, 455, 462, 480, 481, 482, 485 i 4
530, 550, 551, 555, 562, 580, 581, 582, 585 i 4
730, 748, 750, 751, 755, 762, 780, 781, 782, 785, 788 i 4
Subdivision Heading (sb:) 180, 480, 580, 780 v x y z
181, 481, 581, 781 v x y z
182, 482, 582, 782 v x y z
185, 485, 585, 785 v x y z
Subdivision Phrase (sb=) 180, 480, 580, 780 v x y z
181, 481, 581, 781 v x y z
182, 482, 582, 782 v x y z
185, 485, 585, 785 v x y z
Subject Phrase (su=) 150, 450, 550 a b g v x y z
Title (ti:) 031 d t
100, 400, 500 f g h k l m n o p r s t
110, 410, 510 d f g h k l n o p s t
111, 411, 511 d f g h k l n p s t
130, 430, 530 a d f g h k l m n o p r s t
Title Phrase (ti=) 100, 400, 500 f g h k l m n o p r s t
110, 410, 510 d f g h k l n o p s t
111, 411, 511 d f g h k l n p s t
130, 430, 530 a d f g h k l m n o p r s t
Topical (sp:) 150, 450, 550 a b g v x y z
Table Notes [1] Includes all Library of Congress authority records with 010 prefix starting with n* (n, nb, no, nr, or ns).
[2] Subfields from the index for title name headings from tags x00, x10, x11 are the reverse of subfields indexed for personal, corporate, and conference name indexes.
[3] This index contains all Library of Congress authority records with the 010 prefixes sh and sj, as well as x51 headings from authority records with the 010 prefix starting with n* (n, nb, no, nr, or ns).