- From: Markus Lanthaler <markus.lanthaler@gmx.net>
- Date: Tue, 22 Jul 2014 22:58:44 -0700
- To: "'Peter Ansell'" <ansell.peter@gmail.com>, "'Andy Seaborne'" <andy@apache.org>
- Cc: "'Linked JSON'" <public-linked-json@w3.org>, <public-rdf-comments@w3.org>
Hi Andy, On 22 Jul 2014 at 16:28, Peter Ansell wrote: > On 22 July 2014 19:21, Andy Seaborne <andy@apache.org> wrote: >> We are encountering an issue when converting RDF Datasets to JSON-LD. >> >> The problem is with blank nodes that are shared between graphs and lists. >> [...] >> >> But as we understand the conversion algorithm, section 4 only considers each >> graph in turn and so does not see the cross graph sharing. >> >> Is this a correct reading of the spec text? Yes, it is. >> Part 4 of the conversion algorithm has >> "For each name and graph object in graph map: " >> >> so 4.3.3.* walks back up the list in one graph only. >> >> >> There is no _:b1 in :G to refer to because the algorith generated @list and >> its implicit bNodes don't have labels. >> This is a different dataset with no shared bNode. >> >> If it is all the same graph (s/:G1/:G/), the RDF dataset structure is >> correctly serialized. >> >> Andy > > Just to add a reference from RDF-1.1 that may be relevant: > > "Blank nodes can be shared between graphs in an RDF dataset." > > http://www.w3.org/TR/rdf11-concepts/#section-dataset > > The RDF dataset to JSON-LD algorithm doesn't seem to allow for that right now. Yeah, this is clearly a bug. I've added it to the JSON-LD API errata [1] and also filed a issue on our GitHub repo [2]. Thanks for reporting this, Markus [1] http://www.w3.org/2014/json-ld-errata [2] https://github.com/json-ld/json-ld.org/issues/357 -- Markus Lanthaler @markuslanthaler
Received on Wednesday, 23 July 2014 05:59:17 UTC