Library of Congress >> MARC >> Bibliographic >> 3XX  >> 347

347 - Digital File Characteristics (R)


MARC 21 Bibliographic - full
April 2014

First Indicator Second Indicator
Undefined
# - Undefined

Undefined
# - Undefined


Subfield Codes
  • $a - File type (R)
  • $b - Encoding format (R)
  • $c - File size (R)
  • $d - Resolution (R)
  • $e - Regional encoding (R)
  • $f - Encoded bitrate (R)
  • $0 - Authority record control number or standard number (R)
  • $2 - Source (NR)
  • $3 - Materials specified (NR)
  • $6 - Linkage (NR)
  • $8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Technical specification relating to the digital encoding of text, image, audio, video, and other types of data in a resource. This information could also be recorded in field 300 (Physical Description) $b (Other physical details).

Multiple values from the same source vocabulary may be recorded in the same field in separate occurrences of subfields. Terms from different source vocabularies are recorded in separate occurrences of the field.


GUIDELINES FOR APPLYING CONTENT DESIGNATORS

INDICATORS

SUBFIELD CODES

$a - File type

A general type of data content encoded in a computer file.

347 ##$aaudio file$bCD audio$2rda

$b - Encoding format

A schema, standard, etc., used to encode the digital content of a resource.

347 ##$atext file$bPDF$2rda
347 ##$avideo file$bBlu-Ray$2rda

$c - File size

The number of bytes in a digital file.

347 ##$adata file$bXML$c182 KB$2rda

$d - Resolution

The clarity or fineness of detail in a digital image, expressed by the measurement of the image in pixels, etc.

347 ##$aimage file$bJPEG$d3.1 megapixels$2rda

$e - Regional encoding

A code identifying the region of the world for which a digital file has been encoded which may prevent the file from being played on a player from a different region.

347 ##$avideo file$bDVD video$eregion 4$2rda

$f - Encoded bitrate

The speed at which streaming audio, video, etc., is designed to play.

347 ##$aaudio file$bMP3$f32 kbps$2rda

$0 - Authority record control number or standard number

See description of this subfield in Appendix A: Control Subfields.

$2 - Source

Identification of the source of terms when they are from a controlled list.

$3 - Materials specified

Part of the described materials to which the field applies.

$6 - Linkage

See description of this subfield in Appendix A: Control Subfields.

$8 - Field link and sequence number

See description of this subfield in Appendix A: Control Subfields.


CONTENT DESIGNATOR HISTORY

Field 347 - Digital File Characteristics [NEW, 2011]
$f - Transmission speed [RENAMED, 2014]

Library of Congress >> MARC >> Bibliographic >> 3XX  >> 347
(09/22/2015)
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