MLA crosswalk
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MLA crosswalk Presentation Transcript

  • 1. Dublin Core and MARC Eric Childress OCLC Online Computer Library Center Inc. MLA BCC 2000-02-25 Louisville, KY
  • 2. Outline
    • Introduction
    • Dublin Core
    • MARC and ISBD/AACR2
    • Crosswalk principles
    • Illustrative mapping
    • CORC’s capabilities
  • 3. Introduction
    • What is a crosswalk?
      • “ A specification for mapping one metadata standard to another.” -- St. Pierre and LaPlant*
    • Why crosswalk?
      • Interoperability
      • Expose legacy data
      • Expand range of output/format options
      • * http:// www.niso.org/crsswalk.html
  • 4. Lots of Crosswalks…. http://www.ukoln.ac.uk/metadata/interoperability
  • 5. What is Dublin Core?
    • Dublin Core Metadata Element Set
    • Designed to support simple resource description, discovery and retrieval
    • Developed through international consensus process
      • High potential for worldwide adoption
      • Translated into 26 languages (more pending)
    • 15 elements -- all optional, all repeatable
      • Intended as “core” -- domains may extend
      • Envisioned as a simple lingua franca (crosswalk)
  • 6. Dublin Core 1.1
    • A core set of DCMI-blessed qualifiers and encoding schemes are currently under ballot
    purl.org/dc
  • 7. MARC & ISBD/AACR2
    • MARC (ISO 2709)
      • Communications protocol for libraries
      • National iterations + UNIMARC (global)
      • MARC 21: Bibliographic, Authorities, Holdings, Classification, Community Information
      • MARC 21 presumes ISBD-like content rules
    • ISBD & AACR2:
      • Prescribes required elements, order, repeatability punctuation, expression, source of metadata
      • Presumes national interpretations
      • Extensibility possible, but constrained
  • 8. Crosswalk Principles
    • General principles guiding OCLC CORC System's crosswalk:
      • Embrace and, if necessary, extend industry standards
      • Emphasize the predictable and pragmatic
      • Engineer for robust performance and ease of enhancement
      • Expose as much as information content as practical in all supported views
    • LC’s crosswalk:
      • http://lcweb.loc.gov/marc/dccross.html
  • 9. DC to MARC 21 mapping
      • Contributor/Creator 700, 710, 711, 720
      • Coverage 043, 045, 500 , 513, 522, 651, 654
      • Date 260 $c , 307, 541, 567
      • Description 250, 300, 500, 505, 520 , 521, 586
      • Format 300, 538, 856 $q
      • Identifier 020, 022, 024 , 856
      • Language 041, 546
      • Publisher 260 $b , 700, 710, 711, 720
      • Relation 440, 490, 538, 773, 774, 775, 776, 780, 787 $n , 786, 830, 856
      • Rights 506, 540 , 856
      • Source 786 , 856
      • Subject 050, 082, 090, 092, 600, 610, 611, 650, 651, 650, 653 , 690, 699
      • Title 130, 245 , 246
      • Type 516, 655
  • 10. MARC view
  • 11. Dublin Core view
  • 12. Side by Side...
      • 040 No equivalent
      • 035 Not mapped
      • 092 Subject . DDC.Local
      • 245 Title
      • 260 $a Publisher .Place
      • 260 $b Publisher
      • 270 No equivalent
      • 500 Description
      • 500 Description
      • 516 Not mapped
      • 520 Description .Summary
      • 540 $a Rights
      • 540 $2 No equivalent
      • 650, 4 Subject . LCSH
      • 650, 4 Subject . LCSH
      • 856 Identifier . URL
  • 13. Resource Description Format view
  • 14. OCLC CORC System
    • Requires only Web-browser for access/use
    • Incorporates key international standards:
      • Metadata: Dublin Core , AACR2/MARC
      • Characters: Unicode , ALA Character Set
    • Automates the creation and maintenance of:
      • Resource records (bibliographic records)
        • Including URL management (automation + cooperation)
      • Authority records (established forms of names)
      • Pathfinders (Webliographies)
    • Offers Web access to DDC
    • Integrated with OCLC Cataloging & FirstSearch
    purl.oclc.org/corc
  • 15. CORC’s multiple outputs MARC Auth. Records MARC Bib. Records OPAC 1 OPAC-centered 2 Gateway-centered Gateway Pathfinders Dublin Core Metadata
  • 16. Questions?