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Fwd: Re: efficient retrieval of annotation bodies in Annotea (message 2)

From: Marja-Riitta Koivunen <marja@annotea.org>
Date: Sat, 27 Mar 2004 17:01:22 -0500
Message-Id: <5.1.0.14.0.20040327165938.04b8faf0@mail.annotea.org>
To: public-annotea-dev@w3.org


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>Date: Mon, 22 Mar 2004 01:52:40 -0500 (EST)
>From: Charles McCathieNevile <charles@w3.org>
>To: Mark Smith <mcs@pearlcrescent.com>
>Cc: www-annotation@w3.org
>Subject: Re: efficient retrieval of annotation bodies in Annotea
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>This optimisation assumes that the server has the bodies itself. This isn't
>(in a number of the cases I have played with) a valid assumption. So while I
>have no problem with allowing a query that includes "please give me all the
>annotation metadata and bodies that you have for FOO", I think requiring it
>would seriously restrict the usefulness of the protocol.
>
>A simple example is to think of descriptions of images, where a user might
>make an annotation to provide an explicit linkage that can be automatically
>retrieved. This is a common accessibility use case (making an alternative
>representation available for a person who cannot clearly see or interpret the
>picture) where one might often expect to find the body of the annotation is
>an existing resource on the web, referred to rather than held by the annotea
>server.
>
>Cheers
>
>Chaals
>
>On Fri, 19 Mar 2004, Mark Smith wrote:
>
> >
> >[Please accept my apologies if this has already been discussed; I did
> >not find it in the list archives.]
> >
> >I have been looking at the Annotea protocol, and it seems that one HTTP
> >GET request must be issued to retrieve each annotation body.  If a
> >client wants to retrieve the list of annotations for a page as well as
> >all of the associated bodies, it can't do so very efficiently.  Or did I
> >miss something in the spec?
> >
> >Are people open to extending the protocol to allow this kind of query?
> >If so, I'd be happy to experiment a bit and propose something concrete.
> >
> >Reference: http://www.w3.org/2002/12/AnnoteaProtocol-20021219
> >
> >--
> >Mark Smith
> >LDAP Book Information: http://www.ldapbook.com/
> >What's Next:           http://www.pearlcrescent.com/
> >
> >
>
>Charles McCathieNevile  http://www.w3.org/People/Charles  tel: +61 409 134 136
>SWAD-E http://www.w3.org/2001/sw/Europe         fax(france): +33 4 92 38 78 22
>  Post:   21 Mitchell street, FOOTSCRAY Vic 3011, Australia    or
>  W3C, 2004 Route des Lucioles, 06902 Sophia Antipolis Cedex, France
Received on Saturday, 27 March 2004 16:59:42 GMT

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