1. Jenny Walker 6 th March 2001 A review of linking……

2. The generic reference linking problem Given: the information in a standard citation How: does one get to the thing to which the citation refers?

3. IFLA FRBR Model –Work ( e.g. Disgrace by J.M. Coetzee) –Expression (e.g. BBC Radio 4 serialisation) –Manifestation (Hardback, Paperback, Audio Cassette ) –Item (Hardback copy owned by Jenny Walker and signed by the author )

5. not context-sensitivestatic Linking Frameworks: problems

6. via pre-computation requires control of the information environment foolproof links ISI Links, SilverLinker, IOP static Linking Frameworks

8. central database: unique identifiers & metadata look-up facility: input metadata; output identifier insertion of actionable identifiers in resources; identifiers point at a central resolver static DOI/CrossRef, PubMed/PubRef Linking Frameworks

9. CrossRef/DOI lookup References Metadata DOI http://dx.doi.org/10.1093/toxsci/57.1.95

10. not context-sensitive Linking Frameworks: problems

11. “A p p r o p r i a t e” Inspec full text

13. CrossRef/DOI resolution References Metadata DOI DOI link URL to Publisher DOI http://dx.doi.org/10.1093/toxsci/57.1.95

14. Elsevier e-Journals hosted by: Elsevier’s ScienceDirect service Your Library: –ScienceDirect Onsite –Proprietary eg OhioLink, Bibsam, others NESLI/SwetsNet (UK) Via Endeavor? The appropriate copy

15. The appropriate copy problem Given: the information in a citation to a journal article How: does a user get to an appropriate copy of the article?

16. not context-sensitivestaticdynamiccontext-sensitive Linking Frameworks

17. Full text focusclosed Linking Frameworks: limitations

18. closed Linking Frameworks Links are determined by the information service provider Librarian has little or no control over the type of links available

19. Full text focus Linking Frameworks

20. Inspec full text Citation DatabasesOPAC or Ulrichs

21. Full text focusclosedopenExtended services Linking Frameworks

22. The context-sensitive services problem Given: bibliographic metadata How: does one deliver appropriate services for it?

23. Links must work across multiple heterogeneous systems Links must persist over time despite constant underlying changes Linking must work for multiple formats of the same “work”. Links must resolve to the “appropriate” copy. Links should be to content, not systems. Links should be creative!! Linking Requirements

24. jwalker@exlibris-usa.com www.sfxit.com