00X - Variable Control Fields-General Information
MARC 21 Holdings
"Full" documentation refers to the MARC 21 Format for Holdings Data that contains detailed descriptions of every data element, along with examples, input conventions and history sections.
"Concise" documentation refers to the MARC 21 Concise Format for Holdings Data that contains abridged descriptions of every data element, along with examples.
004 - Control Number for Related Bibliographic Record
005 - Date and Time of Latest Transaction
007 - Physical Description Fixed Field
DEFINITION AND SCOPE
Variable control fields contain record control numbers and other kinds of control and
coded information that are used in the processing of separate MARC holdings records.
These fields have no indicators or subfield codes.
Fixed-length fields contain various kinds of information and have data elements that
are positionally defined. A more detailed explanation of positionally defined data
elements is found in the sections describing specific fields.