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Re: URIs and SPARQL endpoints

From: Tony Hammond <t.hammond@nature.com>
Date: Mon, 19 Jun 2006 11:23:00 +0100
To: Dan Brickley <danbri@danbri.org>, Hans Teijgeler <hans.teijgeler@quicknet.nl>
CC: SW-forum <semantic-web@w3.org>, "Paap, Onno" <onno.paap@gmail.com>
Message-ID: <C0BC3994.D836%t.hammond@nature.com>

> URIs are identifiers, basically names for things on the Web.


Well, yes absolutely. But care to elaborate on that Dan? What _exactly_ is
the Web? Hypermedia or information space?



Sorry - don't mean to be awkward but Monday morning and all that.

On 19/6/06 09:48, "Dan Brickley" <danbri@danbri.org> wrote:19/6/06 09:48

> * Hans Teijgeler <hans.teijgeler@quicknet.nl> [2006-06-19 10:24+0200]
>> Hi,
>> When trying to use SPARQL one stumbles upon the concept of "endpoint". When
>> I checked in the (Candidate) Recommendation the word endpoint is not used at
>> all. Yet, when you use Google you get many deliberations about endpoints,
>> but nowhere a definition or standardization. How come? Where can I find
>> reading material about (SPARQL) endpoints that doesn't assume that I already
>> know what it is?
> Interesting point. The word I think comes from the SOAP community, but I
> looked in the SOAP specs and similarly found only casual mention of it
> there. Hunting further, I find it in the "normative definitions" section
> of the Web Services Description Requirements doc at
> http://www.w3.org/TR/ws-desc-reqs/#normDefs
> [[
> EndPoint (AKA Port)
>     [Definition: An association between a fully-specified
>     InterfaceBinding and a network address, specified by a URI [IETF RFC
>     2396], that may be used to communicate with an instance of a Web
>     Service. An EndPoint indicates a specific location for accessing a
>     Web Service using a specific protocol and data format.]
> ]]
> That last phrase is applicable; perhaps the entire definition
> even, since the protocol uses WSDL.
>> I also have a direct question: what is the difference between a URI and an
>> endpoint? Somewhere I read a discussion about this, but the participants in
>> that discussion didn't seem to agree with each other, so it seems that I am
>> not completely alone in my ignorance.
> URIs are identifiers, basically names for things on the Web. Endpoints,
> like many other things, can be named with URIs. There's a lot more about
> URIs in http://www.w3.org/TR/webarch/
> Hope this helps,
> Dan
>> Can someone help me?
>> Regards,
>> Hans
>> ____________________
>> OntoConsult
>> Hans Teijgeler
>> ISO 15926 specialist
>> Netherlands
>> +31-72-509 2005
>> HYPERLINK "http://www.infowebml.ws/"www.InfowebML.ws
>> HYPERLINK "mailto:hans.teijgeler@quicknet.nl"hans.teijgeler@quicknet.nl
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Received on Monday, 19 June 2006 10:23:04 UTC

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