Display Constants
A display constant is a term, phrase, spacing, or punctuation convention that may be system generated under prescribed circumstances in order to make a visual presentation of data in a record more meaningful to a user. In the community information format, certain field tags (e.g., field 505 (Programs Note) , indicators (e.g., field 520 Indicator 1, Display constant controller ), and subfield codes (e.g., the subject subdivision subfields $x, $y, and $z in a subject added entry), may be used to generate specific display constants. The use of display constants is determined by each organization or system. Examples of display constants are provided under Input Conventions in the field descriptions. The general convention of displaying a subfield code as a space in the display of a record is not highlighted in the display constant examples.
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