099 Local Unspecified Call Number 096 Local NLM Call Number 060 National Library of Medicine Call Number 090 Local LC Call Number 050 Library of Congress Call Number
For a library using LC Classification, the typical order is:
099 Local Unspecified Call Number 090 Local LC Call Number 050 Library of Congress Call Number 096 Local NLM Call Number 060 National Library of Medicine Call Number
For a library on Dewey, the typical order is:
099 Local Unspecified Call Number 092 Local Dewey Decimal Call Number 082 Dewey Decimal Call Number
When the Batch Control function [Update Catalog with Batch] is run, the filing software starts with the first tag on the list. If the bib has that tag, then the bib receives that call number. If not, the software goes down the list until a tag from the list is found in the bib.
For example, given this bib in a health science library:
050 00 $a Z6658 $b .I54 1994 $a R118.6
060 ## $a ZWB 100 R784i 1994
096 ## $a ZWB 100 I61 1994
245 00 $a Introduction to reference sources in the health
sciences / $c Fred W. Roper and Jo Anne Boorkman.
Then using the first table of call numbers (099, 096, 060, 090, 050), this bib will have the call number ZWB 100 I61 1994. If 096 were missing, then ZWB 100 R784i 1994 would be the call number.
If the bib is this:
020 $a 0810828898
050 00 $a Z6658 $b .I54 1994 $a R118.6
060 ## $a ZWB 100 R784i 1994
096 ## $a ZWB 100 I61 1994
099 ## INTERNET
245 00 $a Introduction to reference sources in the health
sciences / $c Fred W. Roper and Jo Anne Boorkman.
856 ## $u http://www.rentabook.com/book?0810828898
then the call number would be INTERNET.
When more than one of the same tag exists in a bib, then the last occurrence is used. For example, given:
050 00 $a Z6658 $b .I54 1994 $a R118.6
060 ## $a ZWB 100 R784i 1994
096 ## $a ZWB 100 I61 1994
096 ## $a ZWB 100 I61i 1994
245 00 $a Introduction to reference sources in the health
sciences / $c Fred W. Roper and Jo Anne Boorkman.
If 096 is the first matching tag in the priority list, then the call number would be ZWB 100 I61i 1994.
Only the first subfield a is used, but all subsequent subfields b are used. Given:
050 00 $a Z6658 $b .I54 1994 $a R118.6
then the LC call number would be
Z6658 .I54 1994
Typically, cutters with decimals do not display the decimal in the OPAC.
Bibs imported from the National Library of Medicine often contain more than two 060 fields, e.g.,
060 00 $a 1993 A-526
060 10 $a QV 770 JC6 $b B474c 1993
245 10 $a Chinese herbal medicine : $b materia medica /
$c compiled and translated by Dan Bensky and Andrew
Gamble, with Ted Kaptchuk ; illustrations adapted by
Lilian Lai Bensky.
Notice the first 060. This value would be ignored and the second 060 would be used.
If the call number is three or more X's, then it is not displayed.
If no tags are available, then the call number is ZZZZZ.
Any of the 09X tags may be freely edited. Conversely, 050, 060, and 082 should not be edited (except by those authorities or as actual corrections). When in doubt, give tag 099 the value you want the bib to have.
When holdings are created, an item does not need an individual call number unless there are more than one items for the title and one or more of the items' call number(s) do not match the title's call number. Therefore, if there is only one item, then it never should have a unique call number since the bib should have the correct call number. The item always inherits the bib's call number except when individual items vary from the bib.
If the catalog is in a multiple library configuration, and the catalog does not use the same call number tag priority order as the system default (as determined by function [Properties/System Management/Shared Catalog Management]), then the item automatically copies a call number into item's Call Number field according to its own [Catalog Defaults] field "Call Numbers Tags for this Catalog" list. For example, given a system with a liberal arts library (LC), an engineering library (LC), and a health science library (NLM), then the system default would be:
099 Local Unspecified Call Number 090 Local LC Call Number 050 Library of Congress Call Number 096 Local NLM Call Number 060 National Library of Medicine Call Number
while the health science library uses:
099 Local Unspecified Call Number 096 Local NLM Call Number 060 National Library of Medicine Call Number 090 Local LC Call Number 050 Library of Congress Call Number
Therefore, items created in the LC catalogs would typically not
have embedded call numbers but would use the call numbers from
the bibs, whereas the health science library would automatically
have a call number copied to the items.