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Concise Formats - 2009/2010 Archive >> Classification >> 76X >> 764

764 - Rule Identification (R)

MARC 21 Classification - Concise

2007

This is an ARCHIVED VERSION of the 2009/2010 electronic edition of the MARC 21 Concise Formats. Please see loc.gov/marc/concise/ for the most up-to-date version of the electronic MARC 21 Concise Formats.

Identification of a rule number that is used to build a number by applying a table. Each unique rule number may be translated into a sequence of steps used by a system to calculate the number in classification schemes that have multiple rules for building specific classification numbers.

Indicators

First - Undefined

# - Undefined

Second - Undefined

# - Undefined

Subfield Codes

$a - Rule number (NR)

Identifies a particular rule that is used to apply a specific table to a classification number or span in a classification scheme that has multiple number building rules.

$i - Explanatory text (R)

Textual form of the rule as a sequence of steps to be followed in building a number from a table applied to a classification number span.

$6 - Linkage (NR)

See the description of this subfield in Appendix A: Control Subfields.

$8 - Field link and sequence number (R)

See the description of this subfield in Appendix A: Control Subfields.

Examples


764	##$a2$iSubtract 1 from number in 153/a and add table number to resulting number


764	##$a1$iAdd table number to number in 153/a or to number specified in 761/b if present

Concise Formats - 2009/2010 Archive >> Classification >> 76X >> 764

The Library of Congress >> Librarians, Archivists >> Standards >> MARC

(10/20/2010)