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What consideration has been given to supporting the wider set of "RESTful" functions of which fn:put is but just one member? fn:put seems a little isolated without a complementary fn:delete. Ditto fn:post. Justin Johansson
The XQuery 1.1 requirements document has this as a "maybe" requirement. http://www.w3.org/TR/xquery-11-requirements/ (section 2.3.21) A proposal has been produced by Tim Kraska: http://lists.w3.org/Archives/Member/w3c-xml-query-wg/2008Jun/att-0093/REST_for_XQuery_2008-06-18.pdf (member-only URL) I'm not sure of its current status.
I think you misunderstand - fn:put() does not (necessarily) make an HTTP PUT request.
Who mentioned HTTP? "REST" is an architectural style. See Chapter 5 http://www.ics.uci.edu/~fielding/pubs/dissertation/top.htm The issue is about fn:put being but just one member of a potential wider set of related functions. "This function is normally invoked to create a resource on an external storage system such as a file system or a database." It's not unreasonable to expect to be able to add data to the resource, delete, rename it, manipulate its metadata etc. Of course "REST" is itself just but one member of a potential wider set of architectural styles.
The WG decided not to add this to our work for 1.1, it's not on our requirements list, and we have not had significant demand. We suggest you consider contacting exquery.org in order to flesh this out sooner than the WG can.