Monday, June 1, 2009

Chapt 12 - Marc Records (course notes)

MAchine-Readable Cataloguing (MARC). A group of identifying codes used to communicate bibliographic and other types of data using computers, orignally deveised by the Library of Congress.

Definitions of Terms:

Subfields: Fields are further subdivided into subfields. Each subfield has a name consisting of a delimiter symbol that identifies it as a subfield and a subfield code identifying which kind of subfield it is.

Delimiters: Precede all subfield codes, may display differently in different computer systems but are usually $ or a "not equal to" sign. (Subfield codes a either single letter or numbers

Indicators: Two character positions are available between the tag and the start of data in a field for a field's specific instructions-they tell a computer how to manipulate data in the field.

Content Designation: Process of encoding or marking up a catalog record in MARC format has several names - coding, marking -pup, tagging, but the formal name for the process is content designation.

Content Designation Caveats: Revisions

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