753 Index Term - Uncontrolled (R) (Variable Data Field)
Field definition and scope: Field 753 contains uncontrolled subject access terms that provide subject access to a classification number or span in field 153 (Classification number) or an index term in field 154 (General Explanatory Index Term) . This field contains index terms to supplement terms derived from data in the USMARC classification record that are not derived from a controlled subject heading system/thesaurus. It may be used to provide additional terms not appearing in the classification data record, such as synonyms or permutations of phrases, to provide references between related terms, and to provide vocabulary control using see references. Such index terms are not controlled by a thesaurus or other authority file, such as Library of Congress Subject Headings (LCSH) or Medical Subject Headings (MeSH). Index terms that are controlled are recorded in fields 700 , 710 , 711 , 730 , 750 or 751 .
An uncontrolled index term in field 753 is contained in the record for the classification number or general index term to which it refers. If the index term is associated with a classification number, the record contains field 153 (Classification Number) . If an index term has no classification number associated with it or with any of its subtopics and thus cannot be contained in a record with a classification number in field 153, an index term record may be created (008/06 Kind of record , code c) containing the index term in field 154 (General Explanatory Index Term) , with the associated text in field 753.
Field 753 is repeatable .
Guidelines for applying Content Designators:
Indicators Undefined; each contains a blank (#)
Subfield Codes
$a Index term (R)
$b Index term - Succeeding level (R)
$d Index term referred from (R)
$e Example class number (R)
$i Explanatory text (R)
$s See also reference term (NR)
$t See also reference term - Succeeding level (R)
$u Use reference term (NR)
$v Use reference term - Succeeding level (R)
Conventions: Input Conventions
Related USMARC field or document:
154 General Explanatory Index Term
See also:
