Identifiers Inventory:

• arxiv (see PID Inventory - arXiv notes)
• cugir "bucket" id (unique combination of geospatial area, content, and format)
• digital collection registry: oai-pmh identifier are local (e.g. Cornell:24 )
• dpubs (incl. euclid) / doi et al
• ecommons / handles (e.g. http://hdl.handle.net/1813/11399)
• isbn (where cul is publisher)
• lsdi            / handles (e.g. http://hdl.handle.net/1813.001/2tr5 is sample which resolves to google query)
• purl resolver (for proxied and unproxied e-resources with urls in the cul catalog, purl style but full URL tied to local resolver e.g. http://resolver.library.cornell.edu/misc/3875665, there are 1800 purl-identified documents in Google's index)
• vivo individual URI (working to make directly actionable and do content negotiation), also supports Cornell netId for people
• voyager bib id
• voyager holdings id
• voyager item id
• voyager barcode no.
• worldcat local (e.g. http://cornell.worldcat.org/oclc/241827 where numeric is oclc no.)

Systems to rule in or out:

• erms
• dlxs
• glopad
• kmoddl
• luna insight
• greenstone (mann proceedings?)
• confluence (for tf reports etc. of some lasting value--or should those be deposited elsewhere?)
• usda(has IDs for a document series, not an individual document)
• vet media archive