OLAC Best Practices for Cataloging with the Original RDA Toolkit – April 2023
Changes in MARC Encoding.............................................................................................................42
Changes in MARC Encoding Practice........................................................................................42
MARC Field 041: New and Redefined Subfields for Language Codes........................... 43
MARC Fields 341 and 532: New Fields for Accessibility Content....................................44
MARC field 341, Accessibility Content......................................................................... 44
MARC field 532, Accessibility Note...............................................................................44
MARC Field 345: Redefined Field and New Subfields for Aspect Ratio......................... 44
MARC field 345 Subfields for Video Aspect Ratio.......................................................44
New Encoding Practices to Align Formats...............................................................................45
MARC Field 340, Physical Medium..................................................................................... 45
MARC Field 588, Source of Description Note....................................................................46
Encoding of Multiple Data Elements from the Same Vocabulary........................................46
New Encoding Practice to Support Machine Actionability..............................................47
MARC 21 Format for Bibliographic Data........................................................................................48
Legacy MARC Data......................................................................................................................48
Display versus Machine-Actionable Fields.............................................................................. 48
Record Format: Choosing Type of Record.....................................................................................49
MARC 21 Coding for Selected Fields...............................................................................................50
Record Leader (LDR)...................................................................................................................50
Type of Record, LDR/06....................................................................................................... 50
Bibliographic Level, LDR/07.................................................................................................51
Format-Specific Fixed Length Data Elements (MARC Field 008)...........................................52
All Formats.............................................................................................................................53
Form of Item (Form in OCLC) - Mandatory................................................................. 53
DVD-Video, Blu-ray Discs, and Objects..............................................................................53
Type of Visual Material (008/33) (TMat in OCLC) - Mandatory.................................53
Streaming Video, DVD-Video, and Blu-ray Discs.............................................................. 55
Technique (008/34) (Tech in OCLC) - Optional and recommended........................ 55
Running Time (008/18-20) (Time in OCLC) - Optional and recommended.............55
Type of Date/Publication Status (008/06) (DtSt in OCLC) - Mandatory...................56
Nonmusical Streaming Audio............................................................................................. 56
Literary Text for Sound Recordings (008/30-31) (LTxt in OCLC) - Optional and
recommended................................................................................................................ 56
Video Games......................................................................................................................... 58
Type of Computer File (008/26) (File in OCLC) - Optional and recommended...... 58
Additional Material Characteristics (MARC Field 006)............................................................59