Re: URL attributes

JC Touvet <Jean-Christophe.Touvet@inria.fr> Wed, 17 November 1993 17:20 UTC

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To: Martijn Koster <m.koster@nexor.co.uk>
Cc: pays@faugeres.inria.fr, osi-ds@cs.ucl.ac.uk
Subject: Re: URL attributes
In-Reply-To: <199311171156.AA17544@concorde.inria.fr>
Date: Wed, 17 Nov 1993 18:08:48 +0100
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From: JC Touvet <Jean-Christophe.Touvet@inria.fr>

> To: JC Touvet <Jean-Christophe.Touvet@inria.fr>
> Cc: Martijn Koster <m.koster@nexor.co.uk>uk>, pays@faugeres.inria.fr,
>         osi-ds@cs.ucl.ac.uk
> Subject: Re: URL attributes
> In-Reply-To: Your message of "Wed, 17 Nov 1993 11:40:55 +0100."
<199311171040.AA14669@nuri.inria.fr>
> Date: Wed, 17 Nov 1993 11:56:00 +0000
> From: Martijn Koster <m.koster@nexor.co.uk>
> 
> 
> JC Touvet <Jean-Christophe.Touvet@inria.fr> wrote:
> >
> > > Date: 16 Nov 93 20:05:10+0000
> > > From: Martijn Koster <m.koster@nexor.co.uk>
> > > 
> > > As you say URL's can point to anything. Why then explicitly type them by
> > > calling them VideoURL etc?
> > 
> >  You're obsolutely right, and that's why we've made a "PlainURL" attribute
> >  type, where you can find any kind of URL.
> 
> Yes, but why bother with the specific ones at all? I don't think they are
> really needed, as you can have a description "A picture of Earth" indicating
> what sort of animal is at the other end of a link.
> 
> I don't think setting up yet another typing system is a good idea;
> that is an issue for the URI (as in gopher URLs) and the negotiation in the
> transfer protocol (eg HTTP's Accept: field). Where do you draw the line: 
> CVUrl, ASCIIUrl, WordPerfectUrl...?
> 

 I agree, but we'll keep for instance those attributes in order to maintain
compatibility with some X500 lookup procedures which actually respond to
requests like:

	retreive Someone's Photo
or	retreive Someone's Voice

 If we keep only "raw" URLs in the Directory, that will be somehow difficult to
parse.

> >  Try: http://perignon.inria.fr:2200/htbin/x500person/C=fr;O=inria?touvet
> 
> Nice :-)
> 
> -- Martijn

 Thanks again. Since this morning, we've changed a bit our interface, and made
links to our WWW/WAIS server for each people entry in the INRIA Directory,
depending on their Research Unit.

 Best regards,

	-JCT-