X53 Classification Numbers - General Information

X53 Classification Numbers - General Information (Variable Data Field)

The indicators, subfield codes, and input conventions for the classification number fields listed below follow similar patterns.

153 Classification Number (NR)

453 Invalid Number Tracing (R)

553 Valid Number Tracing (R)

Guidelines for applying Content Designators: The content designators identify the subelements occurring in classification numbers that are constructed according to the classification scheme that is identified in field 084 (Classification Scheme and Edition) . These fields may contain a single classification number (008/07, Type of number , code a) or a span of classification numbers (008/07, code b or c) from a schedule (008/06, Kind of record , code a) or from a table (008/06, code b) and its associated caption (subfield $j) and caption hierarchy (subfield $h and $k). The subject context of the classification number is indicated by the preceding hierarchy captions contained in repeatable subfields $h and $k. (Fields 153, 453, and 553 must contain at least one subfield $a and one subfield $j.)

Indicators:

First Undefined; contains a blank (#) [153]

First Source of classification number [453 / 553]

0 Schedule

1 Table

Second Undefined; contains a blank (#)

Subfield Codes:

Number portion:

$a Classification number element - Single number or beginning number of span (R)

$c Classification number element - Ending number of span (R)

$y Table identification - Schedule (NR)

$z Table identification - Table number (NR)