W3C home > Mailing lists > Public > www-webdav-dasl@w3.org > April to June 1998

RE: Revised charter

From: Saveen Reddy (Exchange) <saveenr@Exchange.Microsoft.com>
Date: Mon, 13 Apr 1998 10:54:10 -0700
Message-ID: <2FBF98FC7852CF11912A00000000000107E78527@DINO>
To: "'Rick Henderson'" <rickh@netscape.com>, Alex Hopmann <hopmann@holonet.net>
Cc: www-webdav-dasl@w3.org
Can someone elaborate on what "cross-language queries" actually means. I
think it would be useful to get some examples on the list of what is meant
(it wasn't entirely clear to me at the author's meeting) -- "cross language"
can be taken to mean several things (at least for me). 

-----Original Message-----
From: Rick Henderson [mailto:rickh@netscape.com]
Sent: Monday, April 13, 1998 10:07 AM
To: Alex Hopmann
Cc: www-webdav-dasl@w3.org
Subject: Re: Revised charter


Weren't we going to say something about not attempting cross-language
and sticking to regular internationalization? 

Other than this question, the charter looks good to me. 


Alex Hopmann wrote: 

Here is a revised proposed charter for DASL, based on some feedback and some

wordsmithing by various folks in Los Angeles. Please comment on this asap to

the list (or privately to me), since I intend to submit this to the IESG by 
the end of next week. 


DAV Searching and Locating (DASL) 

Last Modified: 04-02-98 


Alex Hopmann, <alexhop@microsoft.com> 

Applications Area Director(s): 

Keith Moore, <moore@cs.utk.edu> 
Harald Alvestrand <Harald.T.Alvestrand@uninett.no> 

Applications Area Advisor: 


Mailing Lists: 

General Discussion: www-webdav-dasl@w3.org 

To Subscribe: www-webdav-dasl-request@w3.org Put subscribe in body 

Archive: http://lists.w3.org/Archives/Public/www-webdav-dasl/

Description of Working Group 

The goal of this working group is to define and develop an extensible DAV 
Searching and Locating protocol as an application of HTTP.  The working 
group will define protocol elements that enable server-executed queries to 
locate resources based upon their property values and text content as 
expressed by the DAV data model. 

Problem Definition 

WEBDAV and HTTP enable client-side searching by defining a simple set of 
mechanisms (the PROPFIND and GET methods) to locate those resources meeting 
client-defined criteria. These mechanisms can be inefficient, do not 
adequately deal with some simple content-based queries, and do not take 
advantage of the advanced querying and caching capabilities of modern 
storage systems. 

The DASL Protocol will enable a HTTP/1.1 compliant scheme for server-side 
searching to address these limitations. The working group will define the 
following for a server-side searching mechanism: 

- How to express the search: the syntax and semantics of a query 
- How to focus the query by identifying its scope 
- How to discover the search capability of a resource. 
- The syntax for the search results 

Working Group Scope 

A generalized search mechanism is a broad problem space. It encompasses a 
variety of object models, typing schemes, and media. By focusing on a subset

of this space, the problem of locating resources based on property values 
and text content, the working group will leverage much of the existing work 
that has been done on querying under simple property and resource models. 

In-Scope items include: 
- typing 
- comparisons (>, >=, <, <=, !=, ==) 
- internationalized content 
- text content matching 
- dealing with arbitrary XML values 

Out-of-scope items include: 
- definitions of well-known properties 
- server-to-server communication protocols 
- cross-language comparisons 
- searching for non-text content (images, video, audio, etc.) 
- client control of server administration (e.g. indexing) 


The final output of this working group is expected to be two documents: 

(1) A requirements document, that describes the high-level functional 
requirements for DASL, including rationale. This will be an Informational 

(2) A protocol specification describing the additions to HTTP (new methods, 
headers, request bodies, and response bodies) needed to implement the DASL 
requirements. This will be a Standards Track document. 

Goals and Milestones: 

Done - Draft Working Group Charter. Establish mailing list, archive, and 

Feb 98 - Produce initial Requirements document. Submit as Internet Draft. 

Mar 98 - Produce DASL protocol specification. Submit as Internet Draft. 

Mar 98 - Meet in LA IETF and hold working group meeting to develop the 
protocol specification and requirements document. 

Aug 98 - Meet in Chicago IETF to further develop protocol specification. 

Aug 98 - Complete Scenarios document. 

Dec 98 - Create final version of DASL requirements document.  Submit as 
Informational RFC. 

Mar 99 - Complete revisions to DASL protocol. Submit as a Proposed Standard 



Rick Henderson            (Netscape)(650)937-3152


Received on Monday, 13 April 1998 13:54:12 UTC

This archive was generated by hypermail 2.3.1 : Tuesday, 6 January 2015 20:22:38 UTC