Variable-length Fields in Authority Records

The following table describes the variable-length fields found in authority records. Both the short label and default long label (if one exists) are shown.

Authority Record Fields
Field	Description	Field Group Tag or Default MARC Tag	Data in Field Entered by	Limits	Examples
AUTH INFO	Field used by the system to identify authority records.	%	system	N/A	N/A
LCCN (or LC ARN)	LC Control Number (or LC Authority Record Number). A unique number assigned to a record by LC or a Linked Systems Project partner contributing authority records to the Name Authority Cooperative Program (NACO) database. See also LCCN in the bibliographic record.	o or 010	organization	Maximum 10,000 characters	o010 |an 86702226 |zn 86703136 |zn 86703829
LEADER	A system-generated variable-length field that uses no indicators or subfield identifiers, that stores information about an authority record and the record's structure. See Leader Field.	_ or LEADER	system/ organization	N/A	#####nam 22#####Ia 4500
MESH or MeSH Authority	MeSH (Medical Subject Heading) Authority. MeSH is the National Library of Medicine's controlled vocabulary thesaurus. It consists of sets of terms naming descriptors in a hierarchical structure that permits searching at various levels of specificity. The MeSH thesaurus is used by NLM for indexing articles for the MEDLINE® database. The authorized form of a medical subject.	j	organization	Maximum 10,000 characters	jNeoplasm
MESH S FRM or MeSH See From	MeSH (Medical Subject Heading) See From. "See reference" to the authorized form of a medical subject. Used in an authority record to trace a "see from" reference from a medical subject not used in an established heading.	k	organization	Maximum 10,000 characters	kNeoplasm Mestastasis
MESH SA or MeSH See Also	MeSH (Medical Subject Heading) See Also. "See also reference" to the authorized form of a medical subject. Used in an authority record to trace a "see also from" reference from a medical subject to a related established heading.	l	organization	Maximum 10,000 characters	lCancer lCarcino- lOnco- lTumor
MISC	Miscellaneous.	y or 999	organization	Maximum 10,000 characters	y001 n 50001372 y005 19840322000000.0 y008 800310n| acannaab| |b aaa nz n y040 |aDLC|cDLC
NAME AUTHR or Name Authority	An established personal name used in name, name/title, or extended subject headings.	a or 100	organization	Maximum 10,000 characters	a11020|aNational Recreation Association
NAME S FRM or Name See From	"See reference" to the authorized form of an author. Used in an authority record to trace a "see from" reference from a personal name not used in an established heading.	b or 400	organization	Maximum 10,000 characters	b41020|aNational Recreation Association of America
NAME SA or Name See Also	"See also reference" to the authorized form of an author. Used in an authority record to trace a "see also from" reference from a personal name to a related established heading.	c or 500	organization	Maximum 10,000 characters	c51020|wb|aNational Recreation and Park Association c51020|wa|aPlayground and Recreation Association of America
NOTE	Free text note.	n or 670	organization	Maximum 10,000 characters	n670 |anuc90-22219: Her Azabeche, c1974|b(hdg. on AzU rept.: Sewell, Anna, 1820-1878; usage: Ana Sewell
SUBJ AUTH or Subject Authority	The authorized form of a subject. An established topical term used in main or extended subject headings in authority records.	d or 150	organization	Maximum 10,000 characters	d150 0|aAardvark
SUBJ S FRM or Subject See From	"See reference" to the authorized form of a subject. Used in an authority record to trace a "see from" reference from a topical term not used in an established heading.	e or 450	organization	Maximum 10,000 characters	e450 0|aAnt bear e450 0|aOrycteropodidae e450 0|aOrycteropus e450 0|aOrycteropus afer
SUBJ SA or Subject See Also	"See also reference" to the authorized form of a subject. Used in an authority record to trace a "see also from" reference from a topical term to a related established heading.	f or 550	organization	Maximum 10,000 characters	f550 0|wg|aTubulidentata
UT AUTH or Title Authority	The authorized form of a uniform title or series. An established uniform title used in a title or extended subject heading in authority records.	t or 130	organization	Maximum 10,000 characters	t130 0|aBulletin of the United States Bureau of Labor Statistics
UT SEE FRM or Title See From	"See reference" to the authorized form of a uniform title or series. Used in an authority record to trace a "see from" reference from a uniform title not used in an established heading.	u or 430	organization	Maximum 10,000 characters	u430 0|aBLS bulletin u430 0|aB.L.S. bulletin u430 0|aBulletin (United States. Bureau of Labor Statistics)
UT SA or Title See Also	"See also reference" to the authorized form of a uniform title or series. Used in an authority record to trace a "see also from" reference from a uniform title to a related established heading.	v or 530	organization	Maximum 10,000 characters	v530 0|wa|aBulletin of the Bureau of Labor