Identifiers

• could use URLs, PURLs, DOIs, ... but...

• URLs, locators not identifiers

• DOIs and PURLs resolved centrally

• all resolve to same thing irrespective of who/where the user is. E.g.

  • 10.1045/october2000-granger always resolves to US version even though D-Lib mirrored in UK
  • http://purl.org/dc always resolves to US version even though DC pages mirrored in UK

• DOI and PURL resolved thru US resolver

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