> The aim of Intrallect's "collection" context set is to allow queries to
> be limited to sub-collections within a repository.  I would like to make
> this into a recognised CQL context set, or adopt an existing context set
> which would allow us to do the same thing.

How would that differ from 

collectionName and collectionIdentifier in the record metadata context
set?

http://srw.cheshire3.org/contextSets/rec/1.1/

Rob



> There are some details of what we have implemented so far at
> http://www.intrallect.com/support/intralibrary/v2p8/manuals/integration_guide.html#SRU_CQL.
> At the moment there is one index, "collection.name", used to constrain a
> search by collection name.   I am planning to add a
> "collection.identifier" index field.
> 
> We also want to include information on the collections available in a
> repository (i.e. at least the name and ID of the collections).  We
> thought we would do this in the SRU explain file, but we have been
> struggling to work out what the best extension would be to add this
> information to the ZeeRex schema.  Possible schemes include ISAD, EAD
> and RSLP, e.g. http://www.ukoln.ac.uk/metadata/rslp/isadg/crosswlk.html, 
>   ISO 2146 or the latest version of MODS.
> 
> Ray Denenberg has since suggested using Scan to expose the collection 
> information, which is something I hadn't considered, but seems to make a 
> lot sense for a CQL index.
> 
> Any thoughts would be very welcome.
> 
> Martin
>