055 Second indicator: Type, completeness, source of class/call number

The second indicator position contains a value that indicates:

the type of number involved (whether it is an LC class number, an LC-based call number, or a class/call number assigned from some other classification scheme)

the completeness of the class number (for LC class numbers only)

the source of the number, whether it was assigned by the National Library of Canada or a contributing library.

An LC class number (second indicator value 1, 2, 4, or 5) is one that has been assigned using the Library of Congress Classification or LC Classification--Additions and Changes. An "incomplete" class number (value 2 or 5) lacks a subject Cutter number required by Library of Congress Classification.

An "LC-based" call number (second indicator value 0 or 3) is one that has been assigned using the Library of Congress Classification or LC Classification--Additions and Changes and, in addition, the schedules for Canadian history (FC schedule), Canadian literature (PS 8000-8999), and Canadian law developed by the National Library of Canada. The term does not include numbers from locally modified or expanded LC schedules.

For non-LC, non-LC-based call/class numbers (second indicator value 6, 7, 8, or 9), the source list or scheme used to assign the number may be identified by a code in subfield $2 (Source of call/class number) .

To return, select:

055 Call Numbers/Class Numbers Assigned in Canada