02. Leader, fields 001, 003, 004, 005, 006, 007 and 008 – bibliographic and holdings format

How must this table be read?

• Cells marked with yellow are defined in the CBS MARC 21 format. These tags are "active", i.e. they can be used. So, tags marked with yellow are defined in the CBS MARC 21 format.
• Cells marked with green are defined in the CBS MARC 21 format. These tags are extensions to, i.e. these are not part of the Library of Congress and the OCLC (WorldCat) format. So, tags marked with green are defined in the CBS MARC 21 format.
• Cells with no color. These tags are "reserved" CBS MARC 21 tags; thus, these are non-existing tags now – for the main/master level, the local (LBD) and copy (LHR) level. These tags are only reserved for potential future use. Tags marked with no color may not be used in the CBS MARC 21 format now. So, when we need an extension of the CBS MARC 21 format or a new tag is defined by the MAC (MARC Advisory Committee), we already know what the CBS MARC 21 and CBS MARC 21 PICA+ tags will be.
• Tag descriptions marked with purple are specific OCLC MARC 21 (WorldCat) tags.

Additional MARC 21 documentation

For more MARC 21 documentation:

• Leader           Leaders – bibliographic and holdings format
• 003 and 004   (Under construction)
• 006                 Field 006 - Fixed-length data elements - Additional material characteristics and field 008 – Fixed-length data elements – bibliographic and holdings format
• 007                 Field 007 - Physical description fixed field – bibliographic and holdings format
• 008                 Field 006 - Fixed-length data elements - Additional material characteristics and field 008 – Fixed-length data elements – bibliographic and holdings format

1. (OCLC) MARC tag 001 is not defined in the CBS MARC 21 format.
2. (OCLC) MARC tag 005 is not defined in the CBS MARC 21 format.