- From: Slein, Judith A <JSlein@crt.xerox.com>
- Date: Mon, 12 Oct 1998 17:42:36 -0400
- To: "'Jim Davis'" <jdavis@parc.xerox.com>, slein@wrc.xerox.com, "'WebDAV'" <w3c-dist-auth@w3.org>
I assumed based on the DASL charter and the requirements that it would be possible to query on any property that could be exposed through WebDAV. That would certainly include structured properties. Aside from meeting expectations, DASL would be dramatically more useful if it could accept queries on structured properties. The arguments already presented on the DASL mailing list are compelling: There are already structured properties in the DAV: namespace, and there will certainly be more when the rest of the WebDAV specifications are in place. Just finding out basic information like what resources I have locked would require a structured query. Imagine an application that lets users construct queries. It presents the user with a list of queryable attributes, and a lot of the properties that the user knows exist are not on the list. Why not? Because they are structured. I would find this extremely frustrating. Why can't I query on creator? Because it's a list-valued property. Why can't I query on resource type? Because its values are XML elements rather than strings. --Judy Judith A. Slein CR&T/ADSTC jslein@crt.xerox.com 8*222-5169 > -----Original Message----- > From: Jim Davis [mailto:jdavis@parc.xerox.com] > Sent: Thursday, October 08, 1998 2:56 PM > To: slein@wrc.xerox.com > Subject: DASL solicits your opinions on structured queries (e.g. for > Dublin Core) > > > If you have an opinion about whether DASL should support queries on > structured properties (e.g. for Dublin Core) *please* speak > up in the DASL > list. There have been several posts there asking for opinions on this > point, with little or no response. > > As a result of this silence, the current DASL requirements ID does not > include a requirement for queries on structured properties. > We need to > hear from you on this. > > The DASL home page is http://www.ics.uci.edu/pub/ietf/dasl/ > > (Archived) mail messages of greatest relevance are: > > Structure criteria for DASL queries > http://lists.w3.org/Archives/Public/www-webdav-dasl/1998JulSep > /0087.html > (tries to "make (or reopen) the case for defining a > structure criteria > (also called "structured query") in DASL.") > > Should DASL have structure queries? > http://lists.w3.org/Archives/Public/www-webdav-dasl/1998JulSep > /0113.html > (Attempt to provoke discussion on the need for structured queries) > > If you want to contribute to the design of DASL structured > criteria, there > are two proposals on the table right now, or you can add your own. > > Please see > > initial proposal for structure criteria > http://lists.w3.org/Archives/Public/www-webdav-dasl/1998JulSep /0095.html (Davis's proposal for syntax for structured criteria) Querying WebDAV Hierarchical Properties -- The Proposal http://lists.w3.org/Archives/Public/www-webdav-dasl/1998JulSep/0118.html (Babich's proposal for structured query.) Some background on the above what kinds of structure criteria are needed? http://lists.w3.org/Archives/Public/www-webdav-dasl/1998JulSep/0089.html (lists the structural features that must be testable) Querying WebDAV Hierarchical Properties -- Motivation http://lists.w3.org/Archives/Public/www-webdav-dasl/1998JulSep/0117.html (Design rationale for the Babich proposal)
Received on Monday, 12 October 1998 17:42:24 UTC