Union Database Matching Algorithms

Union Database Matching Algorithms

For more information on standard bibliographic number matching and text-based matching, including validation notes, please choose a union database below.

• BC Union Catalogue (formerly OutLook Online)

• ELN Media Cat (retired in April 2021)

• ELN Serials Cat (retired in April 2021)

BC Union Catalogue (formerly OutLook Online)

• STANDARD BIBLIOGRAPHIC NUMBER MATCH
  
  022 - ISSN withCrossreferencing (match on first occurrence - hyphens and spaces are ignored, upper case letters are normalized)
  
  020 - ISBN withCrossreferencing (match on first occurrence - hyphens and spaces are ignored, upper case letter are normalized)
  
  010 - LCCN withCrossreferencing (hyphens and spaces are ignored, upper case letter are normalized)
  
  Validation on all number matches on:
  
  245 $a 10 characters (normalize upper case letters, special characters are ignored; check field 008 position 35-37 for Language to decide which article to drop in the normalization of field 245)

• TEXT-BASED MATCH
  
  245 $a (all characters) use filing indicator concatenated with $b (all characters) normalize upper case letters
  
  Validate Leader position 6 and 7 (mandatory)
  
  Validate 245 $h first 10 characters; $p first 10 characters as separate validation points, no concatenation
  
  Validate 100, 110, 111 $a first 100 characters (hyphens and spaces are ignored, and upper case letters are normalized if more than one author tag, lowest numbered tag is used)
  
  Validate 260 $b keyword search of first 5 words; match any one word; 260 $c match year with any of first 5 years

• NOTES:

  • Absence of a VALIDATION subfield in any match point WILL inhibit an otherwise valid match.

  • We are recommending that the leader check be dropped for numeric matches.