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Subject Facets in Context

Subject Facets in Context. Jimmie Lundgren, Chair Faceted Subject Access Interest Group January 21, 2011 Dallas, TX. Facets Found in. NextGen Catalogs & Discovery Systems These generally differ in:

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Subject Facets in Context

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  1. Subject Facets in Context Jimmie Lundgren, Chair Faceted Subject Access Interest Group January 21, 2011 Dallas, TX

  2. Facets Found in NextGen Catalogs & Discovery Systems These generally differ in: Scope: Library holdings from traditional catalog vs. those plus articles and digital project resources Nature of metadata: MARC vs. mixture of MARC and multiple forms from article databases and digital projects

  3. Popular Systems NextGen Catalogs AquaBrowser(?) Primo Mango (runs on Solr/Lucene) Discovery Systems EDS Primo Central Summon

  4. Next Generation Catalogs Searches keyword, rarely limited browse Retrieval set limits use facets Facet options vary & may customize, based on data options in MARC catalog records User search system based on classic catalog/ILS data (exceptions?)

  5. NextGen Example: Mango Subject: Topic (MARC 6xx _0) Subject: Time Period (MARC 6xx $y) Subject: Geographic Area (MARC 651 or 6xx $z) Medical Subject: Topic (MARC 6xx _2) Subject: Genre (MARC 655 or 6xx $v)

  6. Discovery Systems Complex coverage may include library holdings, articles, digital projects, etc. Search keyword & fulltext (not browse) Retrieval sets limited using facets Facet options vary & can shift with facet choice such as library catalog holdings Indexes MARC records & other forms of article & digital object metadata

  7. Discovery Example: OneSearch (Summon) For initial retrieval set:Subject Terms Includes terms from many sources LCSH, MESH, subject thesauri If limit to “Items in the library catalog” see Subject terms Genre Region Time Period

  8. Source of Subject Facet Data LCSH, MESH, etc. in MARC catalog records Article metadata use descriptors from different thesauri, some field specific Digital projects subjects may use FAST or LCSH, or input by volunteers (GIGO) Different nomen of same/related thema fail to collocate well by subject facet

  9. FAST Facets are Distinctive • Topical • Geographic • Chronological • Names as Subjects • Form and Genre

  10. Strings Cut in LCSH Fields Subject facets need to be short for display, so each subfield is listed separately Disrupts intended LCSH functionality as constructed strings, along with lack of browse functionality Genre/Form in separate 655 useful

  11. Standardization • In the context of Next Generation Catalogs? • In the context of Discovery Services?

  12. NISO Open Discovery Initiative to Develop Standards and Recommended Practices for Library Discovery Services Based on Indexed Search announced Oct. 2011. “We'd like to see a consistent vocabulary regarding all the elements involved ...” —Jenny Walker, Oct. 2011.

  13. Draft ISO 25964-2 Information and documentation--Thesauri and interoperability with other vocabularies. Part 2. Interoperability with other vocabularies Refers to ISO 999 for how to use them in indexing.

  14. Role of Cataloger/Metadata Librarian Be informed of technical basis of facet functions in NextGen Catalogs and Discovery Systems used in our libraries Share understanding with public service and administrative librarians Appreciate advantages for users of new tools with realistic perspectives (get over loss of browse, merged headings index)

  15. Questions? Jimmie Lundgren, Associate Chair Cataloging & Metadata Dept. jimlund@ufl.edu

  16. Sources FAST http://www.oclc.org/research/activities/fast/default.htm Mango for UF http://uf.catalog.fcla.edu/uf.jsp NISO http://www.niso.org/home/ UF OneSearch http://www.uflib.ufl.edu/

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