- From: james anderson <james@dydra.com>
- Date: Mon, 7 Oct 2013 21:11:50 +0200
- To: public-rdf-dawg-comments@w3.org
good evening;
the text in section 5.1 of the "SPARQL 1.1 Graph Store HTTP Protocol" stipulates that
"If the RDF graph content identified in the request does not exist in the server, and the operation requires that it does, a 404 Not Found response code MUST be provided in the response"
how is one intended to interpret the passage, "the operation requires that it does"? can it be correct, in particular, for a service to respond to a GET with a zero-length 200 or, would a null graph require a 404? if a 200 is correct, under which circumstances? among the archived discussion about the language in this document, there is one message which identifies the issue to be resolved[1]. it notes,
Then "if the specified graph does not exist" must mean that the name is
registered but it names the null graph. But there is another possibility,
which is that the name is not registered in the store.
which points out, that there are two situations in which "graph content ... does not exist". unfortunately, the message stands without response and the recommendation document remains unclear on the topic.
if the recommendation were to specify the status code for each case, it would aid interoperability.
best regards, from berlin,
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[1] : http://lists.w3.org/Archives/Public/public-rdf-dawg-comments/2011Jan/0015.html
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james anderson | james@dydra.com | http://dydra.com
Received on Monday, 7 October 2013 19:12:21 UTC