Difference between revisions of "Dedupe 3.8"

Revision as of 07:57, 1 April 2013

Dedupe 3.8: Group 2 - 020 $a - ISBN (Verify)

International Standard Book Number (ISBN/020)

This field records the International Standard Book Number(s) assigned to a catalogued item. Each valid ISBN is entered in a separate 020 tag; two or more invalid or cancelled ISBNs may be recorded in a single 020 tag.

The following subfields are valid in the 020 tag:

• a - International Standard Book Number
• c - Terms of availability
• z - Cancelled/invalid ISBN

Valid ISBNs are always ten or thirteen digits long; all ISBNs are assumed valid unless they have too many or too few digits, or unless a shelflist card specifically identifies an ISBN as cancelled or invalid:

 
 020 $a 0049812187
 020 $a 9780049853217

The only letter that is ever part of an ISBN is X (roman numeral 10); it must always be capitalized:

 
 020 $a 012817409X

Subfield a may contain qualifying information (publisher, binding, format, volume numbers). This information is usually entered within parentheses; separate pieces of information with space-colon-space:

 
 020 $a 001281947X (pbk.)
 020 $a 0018942113 (Bally Bros. : pbk.)
 020 $a 0137183911 (large print)

Prices appearing after ISBNs are catalogued in subfield c:

 
 020 $a 0174620684 :$c $21.95
 020 $a 0049812187 (pbk.) :$c $17.40

For comparing the ISBN, the normalization will remove all spaces and punctuation and will do a special normalization for the ISBN to standardize it. This normalization only happens in the compare of the records within the program, not in the output.

Defaults

The default for verifying on the 020 (ISBN) within Hit Group 2 (245) is as follows:

1. Must verify if field exists in both records
2. FULL method
3. NACO normalization

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