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Re: All of the WWW Available **Forever**
- To: xanadu@xxxxxxxxxxxxx
- Subject: Re: All of the WWW Available **Forever**
- From: ____Textpert Alert____ <ianf@xxxxxxxxx>
- Date: Fri, 23 May 1997 21:32:56 +0200
- Reply-to: xanadu@xxxxxxxxxxxxxxxxx
Writes Edward Cherlin
> Oh, OK. Does XML provide for referring to older versions of a
> text that the publisher has replaced? That was the point of my
> proposal, now that there is someone archiving the whole Web, with
> a plan to continue at regular intervals.
I haven't studied the drafts in depth yet, mainly because they
are so heavy in jargon, but one of the proposed 'Xptr' provisions
is a _backward-compatible_ ability to add arbitrary arguments
to the URI string, in this fashin:
scheme://server[:port]/path/doc.suffix|arbitrary-argument-string
which would then be evaluated by the back end accordingly to
principles and rules of how such address fragments be decoded.
That means, I guess, that (an imaginary) URL of
scheme://server[:port]/path/doc.suffix|date;version;whatever
^[observe the delimiter]
could deliver the closest-date and/or the precise version of the
requested document from suitably enhanced bac end. In a way, it's
not that unlike the current 'value-added' command/ argument
default mechanism of the HTTP to indicate search argument string
of a URL, only here used to include commands in that string:
scheme://server[:port]/path/doc.suffix?a+b/format-2/
(an example of which can be seen at www.minds.com )
__Ian