[Go-essp-tech] replicas and search

[Luca Cinquini]

Hi Bryan:

On Dec 2, 2009, at 10:20 AM, Bryan Lawrence wrote:

> On Wednesday 02 December 2009 16:47:02 Don Middleton wrote:
>> A follow-on to the call, as I had to leave a bit early. We were
>> discussing being able to use the tracking id for various files. If  
>> the
>> tracking id is not in the federated metadata, how does one know which
>> gateway to consult for information?
>
> I was wondering the same thing ...
>
> I think I've asked this question before, but I can't remember the  
> answer :-)
>
> Is the difference between what is in the Thredds catalog and what is  
> in the rdf representation of it documented anywhere?  (Or, where is  
> the schema for the rdf?)

The schema for the RDF is the owl file itself:

http://ontologies.ucar.edu/owl/esg.owl

or if you want to look at all the ontologies in the package:

http://ontologies.ucar.edu/owl/esg_all.owl

Luca

>
> Cheers
> Bryan
>
>>
>> don
>>
>>
>> On Dec 1, 2009, at 2:30 PM, Luca Cinquini wrote:
>>
>>> Hi,
>>> 	as I mentioned today at the telecon, I think the RDF query services
>>> should be able to handle the concept of dataset replicas quite
>>> nicely. The main concepts are that the RDF records generated from
>>> replicas must have different RDF identifiers, so they can be
>>> exchanged independently among gateways, and must reference their
>>> original RDF record.
>>>
>>> If you are interested, I've documented some of the details here:
>>>
>>> https://wiki.ucar.edu/display/esgcet/Metadata+Search+and+Replicas
>>>
>>> I'm also including a snapshot of an ESG Gateway that shows multiple
>>> replicas returned as part of a DRS search (note that how the
>>> replicas are presented in the result page can be easily changed -
>>> the picture is just to show that the query can handle replicas).
>>>
>>> thanks, Luca
>>>
>>> <DRS with Replicas.tiff>
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>>
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>
>
>
> -- 
> Bryan Lawrence
> Director of Environmental Archival and Associated Research
> (NCAS/British Atmospheric Data Centre and NCEO/NERC NEODC)
> STFC, Rutherford Appleton Laboratory
> Phone +44 1235 445012; Fax ... 5848;
> Web: home.badc.rl.ac.uk/lawrence