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Updated DASL charter

From: Saveen Reddy (Exchange) <saveenr@Exchange.Microsoft.com>
Date: Wed, 18 Feb 1998 10:52:21 -0800
Message-ID: <2FBF98FC7852CF11912A00000000000107E782DC@DINO>
To: www-webdav-dasl@w3.org
Here is the updated charter for DASL based on the BOF discussions.

I'll send a notice shortly when the website is updated with everyone's
slides, etc.



          Charter for DAV Searching and Locating         February 1997

     DAV Searching and Locating (DASL)

     Last Modified: 02-11-97


        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:  

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


     Description of Working Group

        The goal of this working group is to provide searching
        interoperability among the variety of underlying storage
        systems whose data can be exposed by the WEBDAV extensions to
        HTTP. The working group will define HTTP extensions that enable
        server-executed queries to locate resources based upon their
        property values and text content.

     Problem Definition

        WEBDAV and HTTP enable client-side searching by defining a
        simple set of mechanisms (the PROPFIND and GET methods) to
        locate resources of interest, those 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 the 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

        - How to express the search: the syntax and semantics of a
        - How to focus the query by identifying its scope

     Charter for DAV Searching and Locating                          1

          Charter for DAV Searching and Locating         February 1997

        - The syntax for the search results


        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

        In-Scope items include:
        - typing
        - comparisons (>, >=, <, <=, !=, ==)
        - internationalized content
        - text content matching
        - which document types a server should be able to search
        - dealing with arbitrary XML values
        - the role of authentication and access control

        Out-of-scope items include:
        - definitions of default property sets
        - server-to-server communication protocols
        - searching for non-text content (images, video, audio, etc.)
        - client control of server indexing


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

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

        (2) A protocol specification describing the additions to WEBDAV
        (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 homepage.

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

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

     Charter for DAV Searching and Locating                          2

          Charter for DAV Searching and Locating         February 1997

        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

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

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

     Charter for DAV Searching and Locating                          3
Received on Wednesday, 18 February 1998 13:51:59 UTC

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