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Hi Kieran,

> Example #2 - annotation pointing to earlier models
>
> <species metaid="metaid" id="glc" name="glucose">
> <annotation><rdf:RDF><rdf:Description rdf:about="#metaid">
> <bqbiol:is><rdf:Bag>
> <rdf:li rdf:resource="http://www.mcisb.org/model1.xml#metaid_glu"/>
> <rdf:li rdf:resource="urn:miriam:biomodels.db:MODEL2#metaid_G"/>
> </rdf:Bag></bqbiol:is>
> </rdf:Description></rdf:RDF></annotation>
> </species>

There is one main issue with this solution: the stability of
"http://www.mcisb.org/model1.xml#metaid_glu". This is why MIRIAM URNs
were created in the first place: to have perennial annotations and
therefore not relying on unstable physical locations.
Another minor issue here is the fact to have put both URIs in the same
bag: I believe these should be considered alternative and therefore
should be in separate bags.

Anyway, you will be glad to know that we are working on a new software
architecture for BioModels Database, and one of the new feature will be
the handling of all the various revisions of a model. So, users will be
able to access older versions of a given model. We did not settle yet on
the specific way to identify (and access to) these revisions, but one
simple idea is to have another part in the identifier, for example:
BIOMD0000000011.3, where 3 is the "revision number". If such solution
was to be implemented, a MIRIAM URN would be perfectly suitable for
referencing a specific revision of a model.

Best regards.


--
Camille Laibe
BioModels.net Coordinator
European Bioinformatics Institute, Cambridge (UK)
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