Cataloger's Reference Shelf
MARC 21 Format for Bibliographic Data
Cataloger's Reference Shelf
MARC 21 Format for Bibliographic Data
007/12 Electronic resource (/00 = c) |
Level of compression (Variable Control Field - Physical Description Fixed Field)
|
Character position definition and scope:
A one-character alphabetic code indicates what kind of compression the electronic resource has been subjected to. It is used to judge the fidelity of the file to the original. A fill character ( | ) is used when no attempt has been made to code this position.
Record requirements for National-level and Minimal-level records: Optional.
Guidelines for applying content designators:
Code: |
Description: |
a |
Uncompressed The electronic resource has not been compressed through the use of any compression technique. |
b |
|
d |
|
m |
Mixed A mixture of techniques has been used to compress various parts of the electronic resource. |
u |
Unknown The compression techniques are not known. |
| |
No attempt to code |
007/12
Level of compression
[new, 1999]
To return, select:
