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347 Digital File Characteristics (R)


Input Standards

Required if applicable/Required if applicable
1st Indicator  Undefined
blank character  Undefined
2nd Indicator  Undefined
blank character  Undefined
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards 
‡a File type (R) Mandatory/Mandatory
‡b Encoding format (R) Optional/Optional
‡c File size (R) Optional/Optional
‡d Resolution (R) Optional/Optional
‡e Regional encoding (R) Optional/Optional
‡f Transmission speed (R) Optional/Optional
‡0  Authority record control number or standard number (R) Optional/Optional
‡2 Source (NR) Optional/Optional
‡3 Materials specified (NR) Optional/Optional


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) subfield ‡b (Other physical details).

1st Indicator

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

2nd Indicator

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


‡a File type   A general type of data content encoded in a computer file.
347     audio file ‡b CD audio ‡2 rda
‡b Encoding format   A schema, standard, etc., used to encode the digital content of a resource.
347     text file ‡b PDF ‡2 rda
347     video file ‡b Blu-ray ‡2 rda
‡c File size  The number of bytes in a digital file.
347     data file ‡b XML ‡c 182 KB ‡2 rda
‡d Resolution   The clarity or fineness of detail in a digital image, expressed by the measurement of the image in pixels, etc.
347     image file ‡b JPEG ‡d 3.1 megapixels ‡2 rda
‡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     video file ‡b DVD video‡e region 4 ‡2 rda
‡f Transmission speed   The speed at which streaming audio or video is designed to play.
347     audio file ‡b MP3 ‡f 32 kbps ‡2 rda
‡0  Authority record control number or standard number  Subfield ‡0 (zero) contains the system control number of the related authority record or a standard identifier such as an International Standard Name Identifier (ISNI). The control number or identifier is preceded by the appropriate MARC Organization code (for a related authority record) or the Standard Identifier source code (for a standard identifier scheme), enclosed in parentheses. See MARC Code List for Organizations ( for a listing of organization codes and Standard Identifier Source Codes ( for code systems for standard identifiers. Subfield ‡0 is repeatable for different control numbers or identifiers.
Do not input subfield ‡0 in master records, instead use the control headings function. Local authority identifiers may be entered in subfield ‡0 locally, but should not be added to master records in WorldCat.
‡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.

347     ‡3 Compressed thumbnail ‡a image file ‡b JPG ‡d 3.1 megapixels ‡2 rda
347     ‡3 Uncompressed thumbnail ‡a image file ‡b TIFF ‡d 8 megapixels ‡2 rda


Field 347 does not print.

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