683 Application Instruction Note

Field definition and scope:

Field 683 contains a note that gives instructions on applying tables, subarrangements, or additions to classification numbers.

A separate 683 field is used when different types of notes are recorded or when the note only applies to certain institutions that are identified in subfield $5 (Institution to which field applies).

The information in this field is primarily intended to guide classifiers and is often not written in a form adequate for public user display.

Field 683 is repeatable.

Guidelines for applying content designators:

For indicator and subfield code definitions and examples, and designator repeatability, see table below:

Position	Description	Repeatability
Field 683	Application Instruction Note	R
Indicator:
First	Type of note
0	General application
1	Special arrangement of classification topics
2	Optional classification

Second	Undefined; contains a blank

Subfield code:
$a	Classification number - single number or beginning number of span	R
$c	Classification number - ending number of span	R
$i	Explanatory text	R
$p	Corresponding classification field	R
$t	Topic	R
$y	Table sequence number for internal subarrangement or add table	R
$z	Table identification	R
$5	Institution to which field applies	R
$6	Linkage	NR
$8	Field link and sequence number	NR

Scheme-specific conventions:

Library of Congress Classification

Dewey Decimal Classification

Punctuation and Spacing - Punctuation and spacing are matters of judgment.

Content designator history:

Subfield $t - Topic [new, 2008]

Subfield $y - Table sequence number for internal subarrangement or add table [new, 2008]