CommentResponse:RC-2

http://lists.w3.org/Archives/Public/public-rdf-dawg-comments/2010Sep/0002.html

Richard,

My apologies once more for the delayed response.

The SPARQL Working Group has considered your comment regarding specifying the format of the response body for fault conditions when using the SPARQL 1.1 Protocol. We've also considered the subsequent discussion within the thread, as well as implementation experience and the shift of the protocol to be entirely HTTP-based in the time since you originally sent your comment.

The current Last Call specification requires the use of 4XX and 5XX HTTP response codes for failed query and update requests. It leaves the content of the response body implementation-defined, but recommends that implementations might use content negotiation to provide human-readable and/or machine-processable information about the failed requests.

Based on an overall lack of implementation experience and lack of consensus, the Working Group declined to constrain the format of failure responses any more than this.

Please let us know if this response addresses your comment.

thanks, Lee On behalf of the SPARQL WG