Difference between revisions of "Profile Guide Step 2.3"
(New page: == Step 2.3 Question == Image:2-3.png<br> === Leader & Fixed Field Updates === MARS 2.0 Update processing provides a variety of updates and corrections to values in the Leader and fix...) |
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Revision as of 10:27, 6 August 2008
Step 2.3 Question
Leader & Fixed Field Updates
MARS 2.0 Update processing provides a variety of updates and corrections to values in the Leader and fixed fields (006, 007, 008). Indicate whether or not to perform Leader & Fixed Field updates.
You may also elect to modify the standard fixed field updates by making a copy of the fixed field update chart, describing desired changes and returning a copy of the edited chart with your profiles.
Fixed Field Updates Changes to MARC21 replaced many fixed field values or made them obsolete. In the leader, for example, the value p designating a “Record in partial ISBD form” in byte 18, Descriptive Cataloging Form, was made obsolete in 1987 and is now coded using value I (ISBD). MARS 2.0 Update converts an h value in Leader byte 18 to i.
Bytes 18 (Frequency) and 19 (Regularity) in the 008 fixed field for Computer files/Electronic resources format materials were made obsolete in 1995. Additionally, 008 bytes 18-19 are undefined (should not be used) for Mixed materials format. The MARS 2.0 Update software, therefore, converts any values in 008 bytes 18-19 to blanks for Computer files/Electronic resources and Mixed materials records.
MARS 2.0 Leader & Fixed Field Updates Table
In the following table, byte position is counted with the first byte being “00” (zero) to be consistent with MARC21 Bibliographic Format documentation. The table uses the following symbols:
# = blank space
| = fill character
Format codes are as follows:
BK = Books
CF = Computer files/Electronic resources
MP = Maps
MU = Music
CR = Continuing resources (serials, etc.)
VM = Visual materials
MX = Mixed materials (includes obsolete Archival and Manuscripts control)
