1 the ridir project identifier interoperability between repositories vif workshops 22 nd april 2008...
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The RIDIR Project
Identifier interoperability between repositories
VIF Workshops22nd April 2008
Richard Green (University of Hull)
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What’s an identifier?
In the context of RIDIR’s work, an identifier is simply a label associated with some content.
Maybe:an object identifier: hull:34a web address:
edocs.hull.ac.uk/fedora/get/hull:34a handle or DOI: http://dx.doi.org/10.1000/182
but...
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Identifiers
...it could also be:an ISBN: 1 85074 895 0a catalogue entry: 007C8371a title: Stonehenge – a history in photographs...
Identifiers may be unique, they may not. The RIDIR Project is building a demonstrator to show how identifiers stored in repositories could aid interoperability
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Two over-arching use cases
An object moves outside its original curation boundary and becomes ‘lost’. The original URL generates a ‘404 error’. How to find the object and preserve the knowledge?
A user discovers a potentially useful object and wants to see related digital content that may be of use. How to find such content and preserve the knowledge?
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Identifiers to the rescue!
In either situation the user will need to search for the desired objects.
Embedding of identifiers in the object metadata provides a starting point for discovery. ANY identifier is better than none!
...but how to record and systematise the discovery results – and who says they are right?
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RIDIR
The RIDIR system will provide a discovery tool with integrated facilities for
recording and persisting relationships(relationships can be authoritative or non-authoritative)
recalling links to related resources and associated metadata
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Relationships
Relationships in the system can be built up over a period of time.
A user can navigate an existing network of relationships and/or add to them.
Potentially a wide range of relationships, but we need to keep some control...
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Relationships
Possible examples:
PrintisSameAsisVersionOf (!) [needs more granularity]isExtractFrom
BroadcastisSameAsisExtractFromisSignedVersionOfisRepeatOf
etc
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A broadcast exampleSpoken Word Services
Excess Baggage
Guest presenter: John McCarthy
TRILTTelevision Index for Learning and Teaching
Excess Baggage
Sandy Toksvig withtravellers’ tales
Spoken Word ServicesPodcast
Broadcast 1 clip
Excess Baggage clip
Broadcast n clip
hasFurtherDetailAtisSameAs
isExtractFrom
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RIDIR scopeRIDIR users
RIDIR demonstrator applications
PIMS
RIDIR repository services
Mulgara triple-store
Fedora Repository Services
Resource Index API
Fedora object store
RIDIR core services
RIDIR API
Discovery Services
RIDIR Discovery API
IRSThe
European Library?
xISBN?
User Interface
Application Services and Logic
Fedora API
create/update/delete “identified
thing”
create/update/delete
“relationship”
query and return results
static entry page
browse & edit objects,
relationships & metadata
search
view resource
add new object, relationships &
metadata
“Depot” application logic “Locate Related Version” application logic
view candidate matches
“new identifier” splash page
depot common locate related version
Resolution AccessQuery
Browser404 detector
plugin
Browser404 detector
plugin
Browser404 detector
plugin
RIDIR Core Scope
query
Institutional Repositories
Note that this diagram represents a first pass at a structure and will be refined in the completed demonstrator
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VIF and RIDIR
Identifiers are key to establishing relationships
Clear identification of ‘versions’ important
Any identifiers, all identifiers, aid discovery
