W3C home > Mailing lists > Public > public-ldp-wg@w3.org > December 2012

Re: query your API

From: Roger Menday <Roger.Menday@uk.fujitsu.com>
Date: Mon, 10 Dec 2012 15:29:17 +0000
CC: "public-ldp-wg@w3.org" <public-ldp-wg@w3.org>, Andy Seaborne <andy.seaborne@epimorphics.com>
Message-ID: <66091492-D561-4EE6-8F0C-8A509221B943@uk.fujitsu.com>
To: "Wilde, Erik" <Erik.Wilde@emc.com>
>>>> Query is something coming from read-only Linked Data (well, with SPARQL 1.0 anyway), and, so, it is something we can simply assume for LDP ... However, I noticed that "retrieve resource description" is on the use-cases list, and so maybe it is a good idea to also be explicit about 'Query your API' in the UC&R doc ...
>>> Roger - what in your mind is the scope of the query ?
>> That's a good question. not sure. boundaries of the service ..? the graph on the system where the root resource of the service is hosted ? Then: what really is the definition of service ? after all, once something is linked this expands the surface of the service ? 
>> related point: how do service consumers discover a "well known" root resource in LDP? 
> should i add this to ISSUE-37? atompub uses its own service document as the starting point, or there's http://tools.ietf.org/html/draft-nottingham-json-home-02 as a generic way of exposing information about starting points of a REST service.
>>> ... Query the RDF graph that describes a resource
>>> ... Query something that returns a list of resources that match a condition
>>> ... Query an RDF graph, or RDF dataset, that is all RDF in this LDP instance
>>> ... Query a containers and it's contained resources (graph? dataset?)
>>> ...  and there probably other units (container that is automatically all 
>>> resources matching some pattern).
> we had some agreement that we cannot depend on LDP being implemented on top of a SPARQL-capable back-end. which means that any generic SPARQL capabilities are not possible.

Yes. I agree to that ! It must be optional. 

> instead, we need LDP-specific query capabilities, specifying queries of the LDP model.

*if* we do something simple that addresses issue-38, the result might look something like that. 


> cheers,
> dret.

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Received on Monday, 10 December 2012 15:30:13 UTC

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