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RESTful web service with SPARQL

From: Henry Story <henry.story@bblfish.net>
Date: Wed, 6 Jun 2007 14:23:40 -0700
Message-Id: <C2FCD8E9-C739-45DF-8581-3C88887269DF@bblfish.net>
To: Semantic Web <semantic-web@w3.org>

Just a thought, and a lot of handwaving. Could one describe restful  
web service with SPARQL?

1. FORMS and SPARQL
-------------------

Notice how one can look at query interfaces as simplified SPARQL  
statements

Look at the query:

http://www.altavista.com/web/results? 
itag=ody&pg=aq&aqmode=s&aqa=house&nbq=15&stq=20

this can be easily mapped to a SPARQL query:

CONSTRUCT { ?webpage dc:title ?title;
                      dc:summary ?summary . }
WHERE {
         ?webpage :contains ??aqa ;
                  dc:title ?title;
                  dc:summary ?summary .
}
OFFSET ??stq
LIMIT ??nbq

I have added ??var variable with two questionmarks for variables that  
are bound by the altavista param=value pairs
These are replaced first in the query. The result is what would be  
returned if AltaVista returned a SPARQL result.

Let me call this metaSPARQL.


2. RESFUL web services
----------------------

So with this type of vocabulary, we would then be able to describe  
semantic web forms using metaSPARQL. So perhaps we have something to  
describe

http://amazon.com/buy/{??pid}/{??transactionid}

CONSTRUCT { ?product soldto ?person }
WHERE {
     ?person amzon:id ??pid .
     ?product amazon:id ??prodid .
}

Somehow we have to specify that the ??transacitonid is created by the  
post action.

I am feeling my way around this problem in the dark, but I have a  
feeling there is a light switch around here...

Henry

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Received on Wednesday, 6 June 2007 21:23:38 UTC

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