W3C home > Mailing lists > Public > www-archive@w3.org > August 2004

An EPR/URI example

From: Mark Baker <distobj@acm.org>
Date: Fri, 13 Aug 2004 11:00:47 -0400
To: hugo@w3.org
Cc: www-archive@w3.org
Message-ID: <20040813150047.GG18186@markbaker.ca>

Hi again Hugo,

I'm not sure why I didn't just point this out in the first place, but
there's a fine example of the EPR/URI issue in the submission itself;

<wsa:EndpointReference xmlns:wsa="..." xmlns:fabrikam="...">

How is that not a URI like this?


This seems to me to be a *major* problem with WS-Addressing with respect
to Web architecture.

Now, arguably, since the spec seems to be ambiguous about whether or not
visibility into the reference properties/parameters is required by
consumers of the EPR, it may or may not be necessary to peek inside an
http EPR URI - which would of course be a violation of URI opacity "good
practice"[1].  But worst case, EPRs should use a URI scheme which
licenses the kind of peeking that WS-Addressing specifies (even though
I don't think WS-Addressing needs to do that, as they could be fully
opaque and still do their job as identifiers, since it seems that only
the service has to actually process them).

 [1] http://www.w3.org/TR/2004/WD-webarch-20040705/#uri-opacity


P.S. I'm on vacation for the next week, and will be unreachable during
that time.

Mark Baker.   Ottawa, Ontario, CANADA.        http://www.markbaker.ca
Received on Friday, 13 August 2004 14:59:46 UTC

This archive was generated by hypermail 2.3.1 : Wednesday, 7 January 2015 14:42:44 UTC