W3C home > Mailing lists > Public > www-rdf-interest@w3.org > March 2004

Making MGET more GET-friendly?

From: David Powell <djpowell@djpowell.net>
Date: Tue, 9 Mar 2004 22:11:06 +0000
Message-ID: <1728352441.20040309221106@djpowell.net>
To: www-rdf-interest@w3.org


I'm unsure about MGET because it seems to segment URI space, so that
applications that deal with data and metadata need to know whether
they should be using GET or MGET. This isn't possible for applications
such as HTML, XSLT, Babelfish, archive.org, etc..

I think that it is valuable for metadata to be obtainable via GET,
because there are a lot more agents in the wild that support GET than
MGET.

However I agree that some sort of extension is needed to allow clients
to obtain metadata about a resource, so I was thinking about how MGET
could be made more GET-friendly, so that the metadata is really part
of the web.


How about if it was MANDATORY for responses to MGET to have a
Content-Location header giving a URL which could be used to retrieve
the metadata via GET.

In practise the URIQA implementation provides GET'able URIs for the
metadata anyway, and I imagine that this would be a fairly common
technique to ensure compatibility with browsers so it should be cheap
to implement.

Ensuring GET access to MGET content has a number of advantages.

It wouldn't solve the problem of how to discover metadata for legacy
clients, but it would allow clients incapable of performing MGET
requests to still be able to access and process metadata if the URL
for it is discovered on the client's behalf by an MGET-enabled client.

It allows dual-implementations of metadata discovery, eg a webpage
could support MGET, and use one of the other methods such as a <link>
tag.

It also makes it possible to obtain meta-metadata by performing an
MGET on the URL given as the Content-Location. In this scenario,
perhaps an MHEAD method would be useful?


-- 
Dave  
Received on Tuesday, 9 March 2004 17:15:31 UTC

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