MARC Coverage

Interested in viewing the MARC fields used by the HathiTrust catalog records? We provide a table here.

Below is a list of fields on HathiTrust MARC-XML files, by percentage of coverage. This data was processed using public APIs, so the code may help you understand the Hathifiles and HathiTrust Bibliographic API.

Field	Percentage	Description
035	100	SYSTEM CONTROL NUMBER (R)
245	100	TITLE STATEMENT (NR)
538	100	SYSTEM DETAILS NOTE (R)
974	100	NA
CAT	100	NA
CID	100	NA
DAT	100	NA
FMT	100	NA
HOL	100	NA
260	99.681	PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) (R)
300	98.971	PHYSICAL DESCRIPTION (R)
040	95.834	CATALOGING SOURCE (NR)
100	73.913	MAIN ENTRY--PERSONAL NAME (NR)
650	64.913	SUBJECT ADDED ENTRY--TOPICAL TERM (R)
010	51.468	LIBRARY OF CONGRESS CONTROL NUMBER (NR)
050	47.174	LIBRARY OF CONGRESS CALL NUMBER (R)
500	38.911	GENERAL NOTE (R)
504	36.012	BIBLIOGRAPHY, ETC. NOTE (R)
020	34.879	INTERNATIONAL STANDARD BOOK NUMBER (R)
490	28.972	SERIES STATEMENT (R)
700	27.899	ADDED ENTRY--PERSONAL NAME (R)
043	27.784	GEOGRAPHIC AREA CODE (NR)
090	27.604	LOCAL CALL NUMBER (BK AM CF MP MU VM SE) [OBSOLETE]
090	27.604	SHELF LOCATION (AM)[OBSOLETE]
082	20.216	DEWEY DECIMAL CLASSIFICATION NUMBER (R)
651	19.915	SUBJECT ADDED ENTRY--GEOGRAPHIC NAME (R)
250	18.072	EDITION STATEMENT (R)
710	14.503	ADDED ENTRY--CORPORATE NAME (R)
600	14.061	SUBJECT ADDED ENTRY--PERSONAL NAME (R)
049	8.733	NA
880	8.355	ALTERNATE GRAPHIC REPRESENTATION (R)
042	8.061	AUTHENTICATION CODE (NR)
041	7.361	LANGUAGE CODE (R)
110	7.092	MAIN ENTRY--CORPORATE NAME (NR)
246	6.558	VARYING FORM OF TITLE (R)
610	5.859	SUBJECT ADDED ENTRY--CORPORATE NAME (R)
740	5.814	ADDED ENTRY--UNCONTROLLED RELATED/ANALYTICAL TITLE (R)
505	5.075	FORMATTED CONTENTS NOTE (R)
015	4.986	NATIONAL BIBLIOGRAPHY NUMBER (R)
COM	4.369	NA
099	4.35	NA
240	4.179	UNIFORM TITLE (NR)
502	3.33	DISSERTATION NOTE (R)
362	3.309	DATES OF PUBLICATION AND/OR SEQUENTIAL DESIGNATION (R)
086	2.796	GOVERNMENT DOCUMENT CLASSIFICATION NUMBER (R)
546	2.75	LANGUAGE NOTE (R)
066	2.697	CHARACTER SETS PRESENT (NR)
310	1.905	CURRENT PUBLICATION FREQUENCY (NR)
776	1.895	ADDITIONAL PHYSICAL FORM ENTRY (R)
025	1.89	OVERSEAS ACQUISITION NUMBER (R)
074	1.819	GPO ITEM NUMBER (R)
520	1.739	SUMMARY, ETC. (R)
590	1.59	LOCAL NOTE (BK CF MP MU SE VM MX) [OBSOLETE]
590	1.59	RECEIPT DATE NOTE (VM) [OBSOLETE]
690	1.584	NA
045	1.579	TIME PERIOD OF CONTENT (NR)
022	1.503	INTERNATIONAL STANDARD SERIAL NUMBER (R)
111	1.475	MAIN ENTRY--MEETING NAME (NR)
060	1.457	NATIONAL LIBRARY OF MEDICINE CALL NUMBER (R)
072	1.447	SUBJECT CATEGORY CODE (R)
530	1.338	ADDITIONAL PHYSICAL FORM AVAILABLE NOTE (R)
019	1.302	NA
730	1.289	ADDED ENTRY--UNIFORM TITLE (R)
016	1.237	NATIONAL BIBLIOGRAPHIC AGENCY CONTROL NUMBER (R)
630	1.219	SUBJECT ADDED ENTRY--UNIFORM TITLE (R)
048	1.13	NUMBER OF MUSICAL INSTRUMENTS OR VOICES CODE (R)
037	1.111	SOURCE OF ACQUISITION (R)
780	1.081	PRECEDING ENTRY (R)
092	1.08	NA
336	1.042	CONTENT TYPE (R)
337	1.042	MEDIA TYPE (R)
338	1.033	CARRIER TYPE (R)
130	0.987	MAIN ENTRY--UNIFORM TITLE (NR)
785	0.971	SUCCEEDING ENTRY (R)
028	0.963	PUBLISHER NUMBER (R)
098	0.883	NA
222	0.872	KEY TITLE (R)
533	0.822	REPRODUCTION NOTE (R)
515	0.758	NUMBERING PECULIARITIES NOTE (R)
550	0.733	ISSUING BODY NOTE (R)
655	0.705	INDEX TERM--GENRE/FORM (R)
210	0.579	ABBREVIATED TITLE (R)
088	0.539	REPORT NUMBER (R)
580	0.522	LINKING ENTRY COMPLEXITY NOTE (R)
711	0.492	ADDED ENTRY--MEETING NAME (R)
070	0.457	NATIONAL AGRICULTURAL LIBRARY CALL NUMBER (R)
012	0.448	NA
029	0.441	NA
752	0.43	ADDED ENTRY--HIERARCHICAL PLACE NAME (R)
793	0.414	NA
350	0.388	PRICE (NR) (BK AM CF MU VM SE) [OBSOLETE]
830	0.369	SERIES ADDED ENTRY--UNIFORM TITLE (R)
510	0.362	CITATION/REFERENCES NOTE (R)
653	0.339	INDEX TERM--UNCONTROLLED (R)
850	0.319	HOLDING INSTITUTION (R)
321	0.306	FORMER PUBLICATION FREQUENCY (R)
096	0.281	NA
055	0.28	CLASSIFICATION NUMBERS ASSIGNED IN CANADA (R)
024	0.268	OTHER STANDARD IDENTIFIER (R)
247	0.253	FORMER TITLE (R)
084	0.249	OTHER CLASSIFICATION NUMBER (R)
263	0.248	PROJECTED PUBLICATION DATE (NR)
265	0.219	SOURCE FOR ACQUISITION/SUBSCRIPTION ADDRESS (NR) [OBSOLETE]
030	0.21	CODEN DESIGNATION (R)
856	0.202	ELECTRONIC LOCATION AND ACCESS (R)
611	0.192	SUBJECT ADDED ENTRY--MEETING NAME (R)
648	0.169	SUBJECT ADDED ENTRY--CHRONOLOGICAL TERM (R)
051	0.137	LIBRARY OF CONGRESS COPY, ISSUE, OFFPRINT STATEMENT (R)
039	0.131	NA
254	0.126	MUSICAL PRESENTATION STATEMENT (NR)
787	0.122	OTHER RELATIONSHIP ENTRY (R)
525	0.118	SUPPLEMENT NOTE (R)
555	0.117	CUMULATIVE INDEX/FINDING AIDS NOTE (R)
069	0.104	NA
299	0.102	NA
791	0.101	NA
501	0.1	WITH NOTE (R)
536	0.088	FUNDING INFORMATION NOTE (R)
891	0.082	NA
032	0.073	POSTAL REGISTRATION NUMBER (R)
534	0.068	ORIGINAL VERSION NOTE (R)
775	0.064	OTHER EDITION ENTRY (R)
079	0.063	NA
810	0.063	SERIES ADDED ENTRY--CORPORATE NAME (R)
047	0.062	FORM OF MUSICAL COMPOSITION CODE (R)
773	0.062	HOST ITEM ENTRY (R)
596	0.061	NA
410	0.058	SERIES STATEMENT/ADDED ENTRY--CORPORATE NAME (R) [US-LOCAL]
772	0.051	SUPPLEMENT PARENT ENTRY (R)
770	0.05	SUPPLEMENT/SPECIAL ISSUE ENTRY (R)
306	0.047	PLAYING TIME (NR)
799	0.047	NA
255	0.041	CARTOGRAPHIC MATHEMATICAL DATA (R)
561	0.04	OWNERSHIP AND CUSTODIAL HISTORY (R)
583	0.04	ACTION NOTE (R)
059	0.038	NA
080	0.036	UNIVERSAL DECIMAL CLASSIFICATION NUMBER (R)
599	0.036	NA
034	0.034	CODED CARTOGRAPHIC MATHEMATICAL DATA (R)
052	0.033	GEOGRAPHIC CLASSIFICATION (R)
046	0.032	SPECIAL CODED DATES (R)
541	0.031	IMMEDIATE SOURCE OF ACQUISITION NOTE (R)
242	0.03	TRANSLATION OF TITLE BY CATALOGING AGENCY (R)
503	0.025	BIBLIOGRAPHIC HISTORY NOTE (R) (BK CF MU) [OBSOLETE]
540	0.025	TERMS GOVERNING USE AND REPRODUCTION NOTE (R)
027	0.024	STANDARD TECHNICAL REPORT NUMBER (R)
760	0.023	MAIN SERIES ENTRY (R)
586	0.022	AWARDS NOTE (R)
899	0.022	NA
506	0.021	RESTRICTIONS ON ACCESS NOTE (R)
797	0.02	NA
547	0.018	FORMER TITLE COMPLEXITY NOTE (R)
777	0.018	ISSUED WITH ENTRY (R)
521	0.017	TARGET AUDIENCE NOTE (R)
588	0.017	SOURCE OF DESCRIPTION NOTE (R)
212	0.016	VARIANT ACCESS TITLE (R) [OBSOLETE]
691	0.015	NA
699	0.014	NA
866	0.014	TEXTUAL HOLDINGS--BASIC BIBLIOGRAPHIC UNIT (R)
570	0.01	EDITOR NOTE (SE) (R) [OBSOLETE]
513	0.009	TYPE OF REPORT AND PERIOD COVERED NOTE (R)
765	0.009	ORIGINAL LANGUAGE ENTRY (R)
840	0.009	SERIES ADDED ENTRY--TITLE (R) [OBSOLETE]
790	0.006	NA
870	0.006	VARIANT PERSONAL NAME (SE) [OBSOLETE]
044	0.005	COUNTRY OF PUBLISHING/PRODUCING ENTITY CODE (NR)
796	0.005	NA
011	0.004	LINKING LIBRARY OF CONGRESS CONTROL NUMBER (NR) [OBSOLETE]
017	0.004	COPYRIGHT OR LEGAL DEPOSIT NUMBER (R)
264	0.004	PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE (R)
400	0.004	SERIES STATEMENT/ADDED ENTRY--PERSONAL NAME (R) [US-LOCAL]
524	0.004	PREFERRED CITATION OF DESCRIBED MATERIALS NOTE (R)
563	0.004	BINDING INFORMATION (R)
871	0.004	VARIANT CORPORATE NAME (SE) [OBSOLETE]
SID	0.004	NA
411	0.003	SERIES STATEMENT/ADDED ENTRY--MEETING NAME (R) [US-LOCAL]
511	0.003	PARTICIPANT OR PERFORMER NOTE (R)
518	0.003	DATE/TIME AND PLACE OF AN EVENT NOTE (R)
539	0.003	NA
591	0.003	NA
800	0.003	SERIES ADDED ENTRY--PERSONAL NAME (R)
890	0.003	NA
BPF	0.003	NA
031	0.002	MUSICAL INCIPITS INFORMATION (R)
522	0.002	GEOGRAPHIC COVERAGE NOTE (R)
595	0.002	NA
597	0.002	NA
720	0.002	ADDED ENTRY--UNCONTROLLED NAME (R)
767	0.002	TRANSLATION ENTRY (R)
774	0.002	CONSTITUENT UNIT ENTRY (R)
859	0.002	NA
886	0.002	FOREIGN MARC INFORMATION FIELD (R)
033	0.001	DATE/TIME AND PLACE OF AN EVENT (R)
091	0.001	MICROFILM SHELF LOCATION (AM) [OBSOLETE]
105	0.001	NA
131	0.001	NA
243	0.001	COLLECTIVE UNIFORM TITLE (NR)
318	0.001	NA
330	0.001	NA
360	0.001	NA
365	0.001	TRADE PRICE (R)
450	0.001	NA
516	0.001	TYPE OF COMPUTER FILE OR DATA NOTE (R)
545	0.001	BIOGRAPHICAL OR HISTORICAL DATA (R)
562	0.001	COPY AND VERSION IDENTIFICATION NOTE (R)
585	0.001	EXHIBITIONS NOTE (R)
792	0.001	NA
811	0.001	SERIES ADDED ENTRY--MEETING NAME (R)
853	0.001	CAPTIONS AND PATTERN--BASIC BIBLIOGRAPHIC UNIT (R)
865	0.001	ENUMERATION AND CHRONOLOGY--INDEXES (R)