337 Media Type

Field definition and scope:

Field 337 contains the media type which reflects the general type of intermediation device required to view, play, run, etc., the content of a resource. It is used as an alternative to or in addition to the coded expression of Media type in field 007/00 (Category of material). Field 337 information enables indication of more specific media types and media types from various lists.

Multiple media types from the same source vocabulary or code list may be recorded in the same field in separate occurrences of subfield $a (Media type term) and subfield $b (Media type code). Terms from different source vocabularies are recorded in separate occurrences of the field.

The National level record requirement for this field is Optional.

Field 337 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 337	Media Type	O	O	R
Indicator:
First	Undefined; contains a blank	M
Second	Undefined; contains a blank	M

Subfield code:
$a	Media type term	M	O	R
$b	Media type code	M	O	R
$0	Authority record control number or standard number			R
$1	Real World Object URI			R
$2	Source	M	O	NR
$3	Materials specified	O	O	NR
$6	Linkage	A	O	NR
$8	Field link and sequence number	O	O	R

Content designator history:

Field 337 - Media Type [new, 2009]

Subfield $0 - Authority record control number or standard number [new, 2015]

Subfield $1 - Real World Object URI [new, 2017]