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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
ARN
(an:)
001  
LCCN
(ln:)
010
667

 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.

a z
a
ISBN (bn:) 020 a z
ISSN
(in:)
022 a y z
ISSN-L
(ik:)
(ISSN Link)
022 l m

Library of Congress text indexes

Index (label) MARC Fields Indexed MARC Subfields Indexed
Cataloging source (cs:) 040 a c d
Descriptive rules (dx:) 040 e
Personal Names (pn:) 046 f g k l
100, 400, 500, 700 a b c d e j q
Corporate or Conference Names
(cn: or co:)
110, 410, 510, 710 a b c d e n
111, 411, 511, 711 a c d e j n q
151, 451, 551, 751 a
Genre
(ge:)
155, 455, 555, 755 a v x y z
Keyword (kw:) All variable fields All subfields
LC Names

 

(nw:)

 

(n* -prefixed LCCNs only) [1]
046 f g k l
100, 400, 500, 700 a b c d f g h j k l m n o p q r s t
110, 410, 510, 710 a b c d f g h k l m n o p r s t
111, 411, 511, 711 a c d e f g h j k l n p q s t
151, 451, 551, 751 a
130, 430, 530, 730 a d f g h k l m n o p r s t
Notes (nt:) 633, 644 a b t
665, 666, 667, 668 a
670, 678 a b u
680, 681, 682 a i
Titles (ti:)

 

[2]
100, 400, 500, 700 f g h k l m n o p r s t
110, 410, 510, 710 d f g h k l n o p s t
111, 411, 511, 711 d f g h k l n p s t
130, 430, 530, 730 a d f g h k l m n o p r s t
031 d t
Geographic Names (gg:) 151, 451, 551, 751 a v x y z
181, 481, 581, 781 v x y z
781: z only
Entity Attribute (en:) 046 f g k l 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 a
382 a b d p v
383 a b c d e
Relationship
(rx:)
100, 400, 500, 700 e j
110, 410, 510, 710 e
111, 411, 511, 711 j
400, 410, 411, 430, 450,451, 455, 480, 481, 482, 485 i 4
500, 510, 511, 530, 550, 551, 555, 580, 581, 582, 585 i 4
Cartographic Data (cm:) 034 d e f g z
Subdivision Headings (sb:) 180, 480, 580, 780 v x y z
181, 481, 581, 781 v x y z
781: z only
182, 482, 582, 782 v x y z
185, 485, 585, 785 v x y z
Topicals (sp:) 150, 450, 550, 750 a b v x y z
LCSH (su:)
[3]
046 f g k l
100, 400, 500, 700 a b c d e f g h j k l m n o p q r s t v x y z
110, 410, 510, 710 a b c d e f g h j k l m n o p q r s t v x y z
111, 411, 511, 711 a b c d e f g h j k l m n o p q r s t v x y z
130, 430, 530, 730 a b c d e f g h j k l m n o p q r s t v z y z
150, 450, 550, 750 a b v x y z
151, 451, 551, 751 a v x y z
180, 480, 580, 780 v x y z
181, 481, 581, 781 v x y z
781: z only
182, 482, 582, 782 v x y z
185, 485, 585, 785 v x y z
Children's Subjects (sj:) 046 f g
100, 400, 500, 700 a b c d e f g h j k l m n o p q r s t v x y z
110, 410, 510, 710 a b c d e f g h j k l m n o p q r s t v x y z
111, 411, 511, 711 a b c d e f g h j k l m n o p q r s t v x y z
130, 430, 530, 730 a b c d e f g h j k l m n o p q r s t v x y z
150, 450, 550, 750 a b v x y z
151, 451, 551, 751 a v x y z
180, 480, 580, 780 v x y z
181, 481, 581, 781 v x y z
781: z only
182, 482, 582, 782 v x y z
185, 485, 585, 785 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).