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380  Form of Work (R)

Record Type


Input Standards

Field (Full/Minimal)
Required if applicable/Optional
1st Indicator  Undefined
blank character Undefined
2nd Indicator  Undefined
blank character Undefined
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards (Full/Minimal)
ǂa Form of work (R) Required if applicable/Required if applicable
ǂ0 Authority record control number (R) Optional/Optional
ǂ1 Real World Object URI (R) Optional/Optional
ǂ2 Source of term (NR) Required if applicable/Optional
ǂ3 Materials specified (NR) Optional/Optional
ǂ6 Linkage (NR) System supplied/System supplied
ǂ8 Field link and sequence number (R) Optional/Optional


A class or genre to which a work belongs. May be used to differentiate a work from another work with the same title.

Multiple forms of work from the same source vocabulary may be recorded in the same field in separate occurrences of subfield ǂa. Terms from different source vocabularies are recorded in separate occurrences of the field.

For information on punctuation, see the Punctuation section below.

1st Indicator

Undefined. The 1st indicator position is undefined and contains a blank.

blank character


2nd Indicator

Undefined. The 2nd indicator position is undefined and contains a blank.

blank character



ǂa Form of work

A term expressing the class or genre of the work.

100 1   Wilder, Thornton, ǂd 1897-1975, ǂe author
240 1 0 Our town
380     Play
130 0   Cinderella (Choreographic work)
380     Choreographic work
130 0   War of the worlds (Television program)
380     Television program
ǂ0 Authority record control number

For information about subfield ǂ0, see Control Subfields.

ǂ1 Real World Object URI

For information about subfield ǂ1, see Control Subfields.

ǂ2 Source of term

MARC code that identifies the source of the term in subfield ǂa when from a controlled list. See Subject Heading and Term Source Codes.

380     Superhero comic books, strips, etc. ǂ2 lcsh
380     Mystery comic books, strips, etc. ǂ2 gsafd
ǂ3 Materials specified

For information about subfield ǂ3, see Control Subfields.

ǂ6 Linkage

Data that link fields when non-Latin script is entered. This subfield is system supplied and does not appear in OCLC online displays. Do not manually add subfield ǂ6. For more information about subfield ǂ6, see Control Subfields.

ǂ8 Field link and sequence number

For information about subfield ǂ8, see Control Subfields.


For records containing or omitting punctuation, follow these instructions:

  • Include incidental punctuation needed within any subfields, e.g., commas, periods (following abbreviations or initials), etc.
  • Omit punctuation preceding each subfield unless the preceding subfield ends with an ellipsis, exclamation point, hyphen, period (following an abbreviation or initial), question mark, closing bracket, or closing parenthesis
  • Omit the terminal period at the end of the field unless the last word is an abbreviation or initial
380     Handbooks and manuals ǂ2 lcgft

For more information on punctuation, including OCLC policy, see section 2.8, Punctuation.


For indexing and searching information, see Searching WorldCat Indexes, field 380.


For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 380.

This page last revised: December 28, 2020