- From: Jeremy J Carroll <jjc@syapse.com>
- Date: Mon, 22 Jan 2018 15:14:12 -0800
- To: "public-sparql-dev@w3.org" <public-sparql-dev@w3.org>
- Cc: John Walker <john.walker@semaku.com>
- Message-Id: <78EB69E4-CB11-4DFB-9217-A81DC8866E3E@syapse.com>
https://tools.ietf.org/html/rfc7231#section-5.3.3 <https://tools.ietf.org/html/rfc7231#section-5.3.3> I think content negotiation allows the client to specify its charset capabilities separately from content type. Note: The special value "*", if present in the Accept-Charset field, matches every charset that is not mentioned elsewhere in the Accept-Charset field. and A request without any Accept-Charset header field implies that the user agent will accept any charset in response. So, my answer is: the server respond with `text/csv; charset=utf-8` if this is compatible with the Accept-Charset header in the request. Otherwise use the given charset and return an error if there are encoding problems Jeremy J Carroll Senior Principal Architect Syapse, Inc. > On Jan 19, 2018, at 3:31 PM, John Walker <john.walker@semaku.com> wrote: > > Greetings SPARQLers, > > I have an RDF dataset that contains Unicode UTF-8 characters in literal values (but theoretically could also be in an IRI). > > I do a query against the dataset using SPARQL 1.1 Protocol and specify I want CSV results with this header: > > Accept: text/csv > > The SPARQL 1.1 Query Results CSV and TSV Formats recommendation states: > > > Systems providing these formats should note that the content types for CSV is text/csv and for TSV text/tab-separated-values. > > Being text/*, the default character set is US-ASCII. The charset parameter should be used in conjunction with SPARQL Results; > > UTF-8 is recommended: text/csv; charset=utf-8 and text/tab-separated-values; charset=utf-8. > > As the Accept header in the request does not specify a charset, should the server respond with `text/csv; charset=utf-8` or default to `text/csv; charset=iso-8859-1`? > > In case the latter, should the server return an error if the results include UTF-8 characters? > > Regards, > > John Walker > Principal Consultant & co-founder > > Semaku B.V. | Torenallee 20 (SFJ 3D) | 5617 BC Eindhoven | T +31 6 475 22030 | https://semaku.com/ <https://semaku.com/> > KvK: 58031405 | BTW: NL852842156B01 | IBAN: NL94 INGB 0008 3219 95
Received on Monday, 22 January 2018 23:14:38 UTC