GMD processing §

Here is a summary of the GMD processing that is used by TMQ in various software modules. ¶

Since many GMDs are 'made-up' by the cataloger, not all of the data extracted from this field is retained in some PLP crosschecks.  ¶

• a copy of the 245 field is extracted from the record ¶
• subfield $h is extracted from the 245 field ¶
• standard normalization is applied, with the exception that the data is shifted to lowercase ¶
• the plural form of any GMD listed in ACCR2 is replaced with its singular form (eg. 'pictures' becomes 'picture') ¶
• the following replacements are made: ¶
  • 'computer file' becomes 'electronic resource' ¶
  • 'website' becomes 'electronic resource' ¶
  • 'interactive multimedia' becomes 'electronic resource' ¶
  • 'map' becomes 'cartographic material' ¶
  • 'globe' becomes 'cartographic material' ¶
  • 'large print' becomes 'text large print' ¶
  • 'videocassette' becomes 'videorecording' ¶
  • 'video recording' becomes 'videorecording' ¶
  • 'dvd videorecording' becomes 'videorecording' ¶
  • 'dvd' becomes 'videorecording' ¶
  • 'sound cassette' becomes 'sound recording' ¶
  • 'compact disc' becomes 'sound recording' ¶

If any of these replacements are made, the copy of the 245 field in the record being checked is updated with the change. ¶

Subfield $h is extracted from the copy of the 245 field obtained above ¶

• If the GMD contains '(braille)', or any subject heading contains the word 'braille', set the GMD for that record to 'braille' ¶
• all parenthetical qualifiers are extracted, then deleted (eg., '[text (large print)]' becomes '[text]'  ¶
• any data following the closing bracket is deleted (in the event a subfield $b or $c was omitted) ¶
• standard normalization is applied ¶
• If a record contains a normalized GMD that matches any GMD strings in the following list (this list is based upon an LCRI, and so reflects an LC policy), its GMD is set to null:
   ¶

ACTIVITY, ART (eg. ART ORIGINAL, ART REPRODUCTION), CARTOGRAPHIC, 
   CHART, DIORAMA, FLASH, GAME, MICROSCOPE, MODEL, MULTIMEDIA, MUSIC, 
   OBJECT, PICTURE, REALIA, SLIDE, TECHNICAL, TEXT, TOY, TRANSPARENCY
    ¶

• If one record has the GMD 'electronic resource', and the other record has either the GMD 'microform', or no GMD at all, do not fail the crosscheck ¶
• If, at this point, the GMDs in the records being compared are not the same, the crosscheck fails. ¶