- From: Eric Prud'hommeaux <eric@w3.org>
- Date: Fri, 18 May 2012 08:12:50 -0400
- To: Richard Cyganiak <richard@cyganiak.de>
- Cc: Andy Seaborne <andy.seaborne@epimorphics.com>, RDF-WG <public-rdf-wg@w3.org>
* Richard Cyganiak <richard@cyganiak.de> [2012-05-18 12:35+0100] > > On 18 May 2012, at 11:34, Eric Prud'hommeaux wrote: > > Does the existing body of N-Triples permit a grammar with no default whitespace rules? > > > > triples: triple (LF triple)* LF? > > triple: subject HWS predicate HWS object '.' > > > > I.e, do all the N-Triples out there look like "<s> <p> <o>."? > > This is what N-Triples as currently defined requires. Isn't that sufficient? > > ntripleDoc ::= line* > line ::= ws* ( comment | triple )? eoln > triple ::= subject ws+ predicate ws+ object ws* '.' ws* > ws ::= space | tab > eoln ::= cr | lf | cr lf I was just interested to see how much your SHOULD: [[ * Richard Cyganiak <richard@cyganiak.de> [2012-05-18 11:06+0100] > I would even go one step further and add some SHOULD-level guidance on where to put what whitespace. Perhaps something like: exactly one space between s and p; exactly one space between p and o; no WS before or after the period; no WS at the start of a line; CR+LF as EOL. ]] could be turned into a MUST. > Richard > > > > > I note that Oracle has been vigilent about preserving backwards-compatibility. Souri, do you have a sense of what Oracle has been using? > > > >> I also note that RDF 2004 N-Triples allows comments (only at the start of a line). This makes sense for the use as a test case format, but not much sense for the use as a dump format. > >> > >> Best, > >> Richard > >> > >> > >> [1] http://www.w3.org/TR/rdf-testcases/#ntriples > >> > >> > >> > >> On 18 May 2012, at 10:04, Andy Seaborne wrote: > >> > >>> Gavin, Eric, > >>> > >>> rdf-turtle says: > >>> > >>> [1] ntriplesDoc ::= (triple)? (EOL triple)* (EOL)? > >>> [2] triple ::= subject predicate object '.' > >>> [8] EOL ::= ([#xD#xA])+ > >>> > >>> What are the white space rules? > >>> > >>> Does it inherit white space processing from the rest of Turtle? Comments seem to come from Turtle. > >>> > >>> If it does not inherit white space rules, > >>> what about horizontal white space inside triples? > >>> > >>> If it does inherit white space rules, > >>> that includes newlines within triples between S/P or P/O. > >>> > >>> The simplest solution is to add text in section 12.3 to say that horizontal white space outside tokens is discarded (which is different to Turtle). > >>> > >>> Andy > >>> > >> > >> > > > > -- > > -ericP > > > -- -ericP
Received on Friday, 18 May 2012 12:13:25 UTC