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Subject: Re: [xri] SEP type registries and XRD self-descriptions

OASIS must have a registry for such things.. after all, they must  
track schema namespaces already, and the SSTC has a large collection  
of URIs used to define profiles and authN contexts (among other things)


On Nov 21, 2008, at 2:08 AM, Gabe Wachob wrote:

> I registered xrdstype.net - but there was never a lot of interest.
> If you want to take it over, I think that could be arranged. Its  
> just really a namespace...
> On Thu, Nov 20, 2008 at 10:49 PM, Drummond Reed <drummond.reed@cordance.net 
> > wrote:
> > -----Original Message-----
> > From: Barnhill, William [USA] [mailto:barnhill_william@bah.com]
> >
> > <snip>
> >
> > By the way, was a mechanism ever settled on how to register new  
> service
> > endpoint types, or if such a registration process will exist?  To my
> > knowledge the only registry is the wiki one at http:// 
> xrdstype.net/. Is
> > that the standard one at present?
> Bill, there's never been a formal mechanism for registering service  
> endpoint
> types -- since they are URIs, it's inherently decentralized.
> http://xrdstype.net/ and the Wikipedia page for XRDS
> (http://en.wikipedia.org/wiki/XRDS) are the two "directories" I know  
> of.
> > I ask as I'd like to register two service types: one for
> > resource-description, i.e. an endpoint that provides additional  
> metadata
> > on the resource described by XRD, and one for self-description,  
> i.e. an
> > endpoint that provides metadata on the enveloping XRD itself.
> What types of additional resource description do you have in mind?  
> Are you
> thinking other formats (e.g., RDF, POWDER, XDI)? If so, I think that  
> in the
> new XRD design those would just service endpoints with a MediaType  
> (and no
> Type) element plus the URI at which that mediatype was available.  
> Example:
> <XRD>
>        <Service>
>                <MediaType>application/rdf+xml</MediaType>
>                <URI>http://example.com/some/rdf.xml</URI>
>        </Service>
> </XRD>
> As for self-description, we talked about that at the F2F, and no  
> service
> type should be needed for that because XRD discovery is recursive,  
> i.e.,
> since the XRD is itself a resource with a URI, you can do XRD  
> discovery on
> that URI.
> For example, if the original URI on which are doing XRD discovery on  
> is
> http://yahoo.com, and you discovery the URI of its XRD is
> http://yahoo.com/xrd, then to get XRD metadata on the XRD itself,  
> you'd do
> XRD discovery on http://yahoo.com/xrd (which might lead you to a URI  
> like
> http://yahoo.com/xrd/xrd - whatever template Yahoo uses).
> Hope this helps,
> =Drummond
> ---------------------------------------------------------------------
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> -- 
> Gabe Wachob / gwachob@wachob.com \ http://blog.wachob.com

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