653 Index Term - Uncontrolled

Field definition and scope:

Field 653 contains an index term added entry that is not constructed by a standard subject heading/thesaurus-building conventions.

The National level record requirement for this field is Mandatory if applicable.

Field 653 is repeatable.

Guidelines for applying content designators:

For indicator and subfield code definitions and examples, National-level (NLR) and Minimal-level (MLR) record requirements, and designator repeatability, see table below:

Position	Description	NLR	MLR	Repeatability
Field 653	Index Term - Uncontrolled	A	O	R
Indicator:
First	Level of index term	M
#	No information provided	A
0	No level specified	A
1	Primary	A
2	Secondary	A

Second	Type of term or name	M
#	No information provided	A
0	Topical term	A
1	Personal name	A
2	Corporate name	A
3	Meeting name	A
4	Chronological term	A
5	Geographic name	A
6	Genre/form term	A

Subfield code:
$a	Uncontrolled term	M	O	R
$6	Linkage	A	O	NR
$8	Field link and sequence number	O	O	R

Input conventions:

Content designator history:

Second Indicator - Type of term or name [new, 2007]