Re: Can XPointers be used as a name (was Re: RDDL for names ?(was Re:XMLSchema built-in data typenamespaceURI.))

[Charles Reitzel <creitzel@mediaone.net>]

That was one of the threads (Distributed RDDL) I started reading before I noticed the January date...  This time I went and read (most of) Keith Moore's RESCAP draft and immediately I thought of the last great NS URI dereferencing war.  At the time I said something like, "if you had a DNS-like substance for URIs, you could look before you leap."    

Have a look at http://www.ietf.org/internet-drafts/draft-moore-rescap-rc-00.txt

A RESCAP recursive query would help RDDL processing (the client could pass the NS URI back and receive all the URIs contained in the document).  It seems a bit tricky to capture both arcrole and role in the results (simple attribute name/value pairs).

RESCAP could work fine for simple NS URI aliasing, however.  I.e. you could use a good, long term URN-type NS URI and provide a list of mirrored, load-balanced and/or locally cached instances of the schema document available over either HTTP or FTP.  Because it supports signed data, a local server could maintain a secure cache.

take it easy,
Charles Reitzel


At 01:04 PM 3/12/01 -0500, you wrote:
>At 03:43 PM 3/12/01 +0100, Eric van der Vlist wrote:
>>The URI may be a good schema location for my processing needs and a bad
>>choice as a base name for my datatypes.
>>
>>The prefix is a shorthand for the namespace URI that is, in principle,
>>independent of the schema location.
>>
>>This is a powerful feature of W3C XML Schema that would be lost if the
>>namespace URI had to match the schema location.
>
>I'm starting to wonder if maybe we need options which combine the 
>capabilities of RDDL with the indirection of technologies the IETF is 
>developing for asking questions about the nature of particular URIs.
>
>URI metadata might dig us out of this problem.  Is Michael Mealling around?
>
>
>Simon St.Laurent - Associate Editor, O'Reilly and Associates
>XML Elements of Style / XML: A Primer, 2nd Ed.
>XHTML: Migrating Toward XML
>http://www.simonstl.com - XML essays and books
>
>
>------------------------------------------------------------------
>The xml-dev list is sponsored by XML.org, an initiative of OASIS
><http://www.oasis-open.org>
>
>The list archives are at http://lists.xml.org/archives/xml-dev/
>
>To unsubscribe from this elist send a message with the single word
>"unsubscribe" in the body to: xml-dev-request@lists.xml.org 


take it easy,
Charles Reitzel