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DRAFT FOR COMMENTS EcoGrid needs to provide a consistent identification scheme for data objects and metadata records in the system, among other things. This identifier format should allow for the creation of globally unique identifiers, hopefully with a local part that is assigned at the participating service rather than centrally.
Proposed Identifier FormatsIn the past meetings we've discussed trying to standardize our identifier formats, but so far none of the systems (srb, metacat, etc) will accept identifers of the format we've discussed. In Edinburgh, our proposed ID format was:
urn:ecogrid://scope/localIdentifier where scope is a symbolic name from the registry that can be used to look up the wsdl (and therefore endpoint) of the EcoGrid query service. However, we've also discussed using LSID's as the taxon group is doing, which take the form:
URN:LSID:authority:namespace:objectId:revision The revision is optional, and taxon and ecogrid have both agreed that it should NOT be used (and that any versioning information belongs in the metadata). The authority is a DNS name that resolves via DNS to a service that can be used to resolve the LSID to actual physical locations. 'Namespace' is analogous to our 'scope', and 'objectId' is analogous to our 'localIdentifier'. So, this is similar to our proposal above, but relies on DNS instead of our registry for the resolution service.
ReferencesLSID Specification LSID Java Tutorial
EcoGridCommunity
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| This material is based upon work supported by the National Science Foundation under award 0225676. Any opinions, findings and conclusions or recomendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation (NSF). Copyright 2004 Partnership for Biodiversity Informatics, University of New Mexico, The Regents of the University of California, and University of Kansas |
