W3C home > Mailing lists > Public > public-xml-processing-model-wg@w3.org > July 2008

uniformity between p:input, c:http-request, and steps like XQuery

From: Alex Milowski <alex@milowski.org>
Date: Thu, 17 Jul 2008 07:43:39 -0700
Message-ID: <28d56ece0807170743y34911e5bye216ebcdf9ef9493@mail.gmail.com>
To: "XProc WG" <public-xml-processing-model-wg@w3.org>

Right now, if you construct a file URI and pass it to c:http-request, you're
likely to get the contents of the file encoded as a c:body element.  In the
case of XML resources, the result should be identical between c:http-request,
p:input with a p:document element, and c:load.

Now, c:http-request can load non-XML resources via the same process.  For
example, if I had an XQuery on the disk, I could load it via c:http-request and
then I'd have to rename c:body to c:query.

If c:http-request can load files, why can p:input/p:document ?

I can see leaving p:load alone as the "load an XML resource"s step.

We can rely on the same rules for conversion via media type (or implied
media type via last-segment extensions) into a c:body for non-XML media

This would mean that the proposed change by the XQuery WG to the
XQuery step to add the "query-uri" option wouldn't be necessary.  You'd
just point to the  query resource via a p:document element and the
application/xquery media type would result in a c:body that is appropriate
encoded.  We could then change the XQuery step to allow c:body as well
as c:query (which seems like a good idea regardless of this proposal).

--Alex Milowski
"The excellence of grammar as a guide is proportional to the paucity of the
inflexions, i.e. to the degree of analysis effected by the language

Bertrand Russell in a footnote of Principles of Mathematics
Received on Thursday, 17 July 2008 14:44:17 UTC

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