The Call Number Mapping mapping table allows you to customize the way call number information maps from the bibliographic record to the holdings record. The following methods use this mapping table:

• Saving a new holdings record in the MD Editor. Note that the call numbers are not mapped to modified holding records unless you use one of the other methods.
• Running the Update from Bibliographic tool for a new or modified holdings record from the Record Actions menu in the MD Editor.
  In order to use the Update from Bibliographic feature, the Normalize on Save normalization process (Configuration > Resources > Metadata configuration > MARC21 Holding > Normalization processes) needs to be enabled, and have the "852 field normalization" task first in the list.
  
  
  852 Field Normalization
• Running an import profile job.
• Change Holding Information job (see Manual Jobs and Their Relevant Parameters)

Alma uses the first matching row in the mapping table to map the call number for each record. To determine the matching row, Alma compares each record with each enabled mapping row (starting at the top of the table) and stops checking when a mapping row matches all of the following conditions:

• The first indicator of the 852 field in the holdings record matches the indicator specified in the 852 Ist Ind column of the mapping table.
• If the first indicator of the 852 field in the holdings record is a 7, the value specified in the 852 Subfield 2 column must also match the corresponding value in the holdings record.
• The MARC tag specified in the Bib Field to Copy column of the mapping record exists in the bibliographic record.

If a matching row is found, the fields and subfields specified in the Bib Field Copy and Bib Subfields to Copy columns are copied from the bibliographic record to the 852 subfields specified in the 852 Subfield Destinations columns. If all conditions are not met, the system continues to the next row in the mapping table.

Out of the box, the mapping table uses the following rules to map the information:

• For the 0 indicator, replaces the h and i subfields with the content of the bibliographic record’s 090 a and b subfields (respectively). If there is no 090 field in the bibliographic record, the 050 a and b subfields are used instead.
• For the 1 indicator, replaces the h and i subfields with the content of the bibliographic record’s 082 a and b subfields (respectively).
• For the 2 indicator, replaces the h and i subfields with the content of the bibliographic record’s 060 a and b subfields (respectively).
• For the 3 indicator, adds the h and i subfields with the content of the bibliographic record’s 086 a and b subfields (respectively). If the h and i subfields are already populated, their values are left as is and not replaced.
• For the 8 indicator, adds the h subfield with a concatenation of the bibliographic record's 084 a subfield values. (If the h subfield is already populated, its value is left as is.) Also replaces the i subfield with a concatenation of the 084 b subfield values.