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OCLC Support

Get a classification number for a bibliographic record

Discover how to get a classification number for a bibliographic record in Connexion client.

Get a Dewey or Library of Congress classification number

The Classify command on the Edit menu opens the prototype OCLC Classify Web service, a FRBR-based service created by OCLC Research. The service automatically retrieves a classification number in a matching WorldCat record for any material type—books, DVDs, CDs, and more. The client automatically inserts the class number in the displayed bibliographic record in a field that you specify.

Set a classification scheme and variable field for using the prototype OCLC Classify Web service

Before using the Classify command, set options to specify which class scheme you want to use and which field you want to insert to contain the class number:

  1. Navigate to Tools > Options > Classify or press <Alt><T><O><L>.
  2. Select the classification scheme you want to use.
    • Dewey
    • Library of Congress (default)
  3. Enter the tag for the field where you want to insert the classification number in the Create the following variable field from Classify result field.
    Default: 090
  4. Click OK or Apply.

Get a class number

  1. With any bibliographic record open (WorldCat record online, workform, online or local save file record, or online or local constant data), click Edit > Classify or press <Alt><E><L>.
    • If a single numeric match is found, the most frequently used class number of the scheme you set is automatically inserted in the field you specified in Tools > Options > Classify, and the record is reformatted in the correct MARC tag order. The action is completed, and you are done.
    • If no numeric match is found, or if multiple matches are found, Connexion asks if you want to open the Classify Web service. Click Yes or No.
      • If you click No, the prompt closes, and you are returned to the record you were editing. You are done.
      • If you click Yes, a Classify window (titled Get Classification Number from Classify) opens. In this case, go to step 2.
  2. If no match was found and you open the Classify service window - In the Title/Author search boxes, Connexion automatically:
    • Enters all of the data extracted from field 1XX $a (where X = any number) and field 245 $a of the bibliographic record, excluding subfield delimiters and codes. If no 1XX field exists, data is extracted from 245 $a only.
    • Runs the search.
      Select a record from the results list.
      Edit the search criteria, click Search, and select a record from the results.

    If multiple matches were found - The Classify window displays the results. The standard number that matched is inserted in the Standard Number search box, and all of the matches are listed in the Editions list.
  3. When you have a record with a class number you want to insert:
    1. Highlight the entire classification number in the list.
    2. Press <Ctrl><C> to copy it to the clipboard.
    3. Click Insert Field for Class (keeps the Classify window open), or click Insert and Close (closes the Classify window). The number is inserted in the field you designated in Tools > Options > Classify.

 Note: As a convenience, you can also open the OCLC Classify Web service from within the client independently of any client functionality using Help > Useful Web Links > OCLC Classify Web Service or press <Alt><H><U><W>.

How the Classify Web service matches records

Connexion client sends the following numbers in this order to the Classify service for matching in WorldCat records:

  • OCLC control number
  • ISBN (International Standard Book Number)
  • ISSN (International Standard Serial Number)
  • UPC (Universal Product Code)
  • LCCN (Library of Congress control number)

From the following fields and subfields in this order:

  • 001
  • 019 $a
  • 020 $a
  • 022 $a
  • 022 $z
  • 024 $a
  • 010 $a
  • 010 $z