[handle-dev] OpenHandle

["Hammond, Tony (ELSLON)" <T.Hammond@elsevier.com>]

For something different - an OpenHandle servlet:

	http://hdl.handle.net/1014/open

You should be able to try any legitimate handle, eg

* for Elsevier handle service (1014)

	1014/oboe
	1014/yads
	1014/1

* for DOI handle service (10)

	10.1006/geno
	10.1016/S0888-7543(03)00007-7
	10.1000/240

* for Global handle service (0) - the most interesting

	0.serv/10
	0.na/10

(service and naming authority handles for DOI)

Tony


A few rough edges here and there but anyway. What is it?


* A simple declarative means for a user to interact with handle

* Uses the ANSI/NISO OpenURL Framework to query handle and
  receive back a structured XML response. (OpenURL drafts posted
  at <http://library.caltech.edu/openurl/Public_Comments.htm>)

* Alternate responses could include resolution to stored URI,
  service referral, etc

* OpenURL Framework allows contextual information to be bundled along
  with the query/response messaging

* An RDF schema (using OWL) is defined for the ContextObject Format
  of the OpenURL Framework

* A handle is given as an OpenURL Referent Identifier - the full
  handle record is then returned as Referent Private Data

* An RDF Schema is defined for a handle record - supports the
  predefined handle types HS_ADMIN, HS_SITE, HS_SERV, HS_PRIMARY,
  HS_ALIAS, HS_VLIST
 
* Service data is passsed up as ServiceType Identifiers (for service
  directives - eg authoritative query, etc) or as ServiceType
  Metadata (service filtering - on index/type), and is passed back
  as ServiceType Private Data (service messages)

* Controversial point - handle references are given compactly in
  handle URIref form - eg <hdl://0.NA/1006#index=200> indicates
  the handle value at index 200 for the handle 0.NA/1006

* Handle URIref form is how a handle client would address into a
  handle resource - suggest that an alternate means of filtering
  handle values is to use a fragment identifier syntax, eg
  <#index=2;type=url> to return values of type URL at index 2 

* In sum - Resource Description Framework over OpenURL Framework

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