Modifying existing records
How much in a record should be changed?
When is it critical to make changes?
When is it important to make changes?
When is it unimportant to make changes?
How to deal with mixed practice?
Cataloging done according to various versions of AACR and LCRI
Valid at the time; data still accurate
When to report needed changes to OCLC?
If no authorization to edit master record
When multiple records could be collapsed under new rules
How have serials and loose-leaf catalogers approached these issues?