520 Summary, Etc. (R) (Variable Data Field)
Field 520 contains unformatted information about the scope and general contents of the described materials. This could be a summary, abstract, annotation, review, or only a phrase describing the material.
The level of detail appropriate in a summary may vary depending on the audience for a particular product. When a distinction between levels of detail is required, a brief summary is given in subfield $a and a fuller annotation is given in subfield $b .
The text is sometimes displayed and/or printed with an introductory term that is generated as a display constant based on the first indicator value .
The National level record requirement for this field is Optional.
Field 520 is repeatable .
Guidelines for applying content designators:
For indicator and subfield code definitions and examples, National-level (NLR) and Minimal-level (MLR) record requirements , and designator repeatability , see table below:
Position | Description | NLR | MLR | Repeatability |
Field 520 | Summary, Etc. | O | O | R |
First | M | |||
A | ||||
0 | A | |||
1 | A | |||
2 | A | |||
3 | A | |||
8 | A | |||
Second | Undefined; contains a blank | M | ||
Subfield code: | ||||
M | O | NR | ||
$b | O | O | NR | |
$u | O | O | R | |
$3 | O | O | NR | |
$6 | A | O | NR | |
$8 | O | O | R |
Subfield $z - Source of note information (BK AM CF SE) [obsolete]: Subfield $z was made obsolete in 1990. Source information is included as part of the summary note in subfield $a or the expansion of the summary note in subfield $b.
Related MARC field or document:
880 Alternate Graphic Representation
See also:
