[Auscope-geosciml] Resolver use case

Boisvert, Eric Eric.Boisvert at RNCan-NRCan.gc.ca
Thu Oct 8 11:10:49 EDT 2009

I'm writing the resolver use case and the more I dig in the details, the more I find road blocks.  I think the first document I will submit to the group is a discussion document, where I expose many of the issues I found (I'm at #12) that should be addressed before we write any useful use case.

One thing I want to push to the group is the codeSpace="urn:ietf:rfc:2141" vs codeSpace="www.cgi-iugs.org/uri".  I vaguely remember that we should now use the latter.
I read in https://www.seegrid.csiro.au/twiki/bin/view/CGIModel/CGIIdentifierScheme#Object_and_Feature_identifiers

Object and Feature identifiers 

Attach an identifier to a GML-encoded feature or object using gml:identifier (GML 3.2 and later) or gml:name (GML 3.1 and earlier) using the following pattern: 
<gml:identifier codeSpace="http://www.cgi-iugs.org/uri ">urn:cgi:feature:USGS:2feb49bc-6755-11dc-8314-0800200c9a66</gsml:value>

<gml:name codeSpace="http://www.cgi-iugs.org/uri ">urn:cgi:party:GA:LesleyWyborn</gsml:value>

http://www.cgi-iugs.org/uri is the address of the CGI URN resolver, as specified in RFC 5138. 

The RFC 5138 says that there is a URN at this location (http://www.cgi-iugs.org/uri) which by the way does not work anymore, but it does not say that the codeSpace must contain the url of the resolver. In other words, are we using this url in the codeSpace just as a flag, or to indicate where the resolver is.  The fact that this url does not anymore is a good demonstration of the issue here, isn't it ?


Eric Boisvert
Spécialiste TI-GI / IT-IM specialist
Eric.Boisvert at rncan.gc.ca, 418-654-3705, facsimile/télécopieur 
490, rue de la Couronne, Québec (Québec), G1K 9A9
490, rue de la Couronne, Quebec, Quebec, G1K 9A9

Laboratoire de cartographie numérique et de photogrammétrie (LCNP)
Digital Cartography and Photogrammetry Laboratory (DCPL)
Commission géologique du Canada (Québec) / Geological Survey of Canada (Quebec)
Ressources naturelles Canada / Natural Resources Canada
Gouvernement du Canada / Government of Canada
http://cgc.rncan.gc.ca/dir/index_f.php?id=4186 / http://cgc.rncan.gc.ca/dir/index_e.php?id=4186

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