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Subject: RE: [xri-comment] W3C TAG Questions on Draft #2 of XRI Resolution V 2.0


Thank you for submitting this via the xri-comment list -- XRI TC members on
the TAG list had forwarded the copy of the comment posted there to us last
week, but it helps to have received it officially.

We are happy to answer these questions and should have a response to you by
next week. We'll be sure to cc www-tag@w3.org.


=Drummond Reed

> -----Original Message-----
> From: Henry S. Thompson [mailto:ht@inf.ed.ac.uk]
> Sent: Wednesday, February 13, 2008 7:17 AM
> To: xri-comment@lists.oasis-open.org
> Subject: [xri-comment] W3C TAG Questions on Draft #2 of XRI Resolution V
> 2.0
> > To: xri-comment@lists.oasis-open.org
> > Date: Fri, 1 Feb 2008 14:04:22 -0500
> [trying to get this in the archives on behalf of the original sender]
> I am writing on behalf of the World Wide Web Consortium Technical
> Architecture Group (TAG).  The purpose of this note is to pose to you some
> questions that arose during our discussion of "Committee draft 2 of
> Extensible Resource Identifier (XRI) Resolution Version 2.0" [1].   It is
> possible that the TAG would later wish to offer some comments and
> suggestions regarding XRI and its relationship to the architecture of the
> Web, but first we feel we need to better understand the intended uses of
> XRI.  We apologise for engaging in reviewing your work so late, and we
> hope and trust that you will remain open to further questions and comment
> from us as our review progresses.
> We would very much appreciate it if you could clarify whether we have read
> the XRI Resolution specification correctly in inferring that:
> 1) All access to resources identified by XRIs
>    require (at least) two round trips, the
>    first to retrieve metadata (XRDS, XRD or
>    uri list) and the second to retrieve
>    (a representation of) the resource itself?
> 2) HTTP content negotiation can be used in
>    requests for XRIs to force either metadata
>    return or redirection to actual resource
>    representations?
> 3) Relative XRIs are of course allowed in the
>    normal way when a full-form XRI has been
>    established as the base URI.  Are they also
>    allowed _without_ any full-form XRI as a
>    base URI?  That is, for example, is "=henry"
>    intended to be recognize as an XRI in the
>    absence of any base URI?  If so, what is
>    being done to ensure that both now and in
>    the future, the syntax of such abbreviated
>    XRIs is coordinated with (I.e. remains
>    disjoint from) the syntax of both absolute
>    and relative URIs that might be used in the
>    same contexts?
> Also, could you let us know what steps, if any, you have taken towards
> registration of 'xri' as a URI scheme with the IETF?
> Thank you very much for your attention to these questions.
> (Note that this email has been bcc:'d to the www-tag@w3.org public mailing
> list.  bcc: has been used to avoid the problems inherent in email threads
> that are cross posted on multiple lists.  Please note, however, that
> members of the TAG and many members of the community who work with us are
> unlikely to monitor responses sent only to the xri-comments list.
> Accordingly, if you wish correspondence to be seen by the TAG, we encourge
> you to send it to the www-tag@w3.org list.)
> Noah Mendelsohn
> For the World Wide Web Consortium Technical Architecture Group (TAG)
> [1]
> http://docs.oasis-open.org/xri/2.0/specs/cd02/xri-resolution-V2.0-cd-
> 02.html
> --------------------------------------
> Noah Mendelsohn
> IBM Corporation
> One Rogers Street
> Cambridge, MA 02142
> 1-617-693-4036
> --------------------------------------
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