- From: Christopher Gutteridge <cjg@ecs.soton.ac.uk>
- Date: Mon, 13 Jun 2011 16:04:14 +0100
- To: Richard Cyganiak <richard@cyganiak.de>
- CC: public-lod@w3.org
sigh. Thanks for the explanations, even if they fail to increase my joy. Seems like we'd need some reasoning that knows that ranges & domains of something are an information resource, not an information resource, or either. With a bit of logic that says that statements on an information resource which can't be on an information resource should be treated as applying to their primary-topic rather than be disregarded. I get a headache trying to work out the details, though. dc:creator can certainly refer to a real world thing (eg. the statue of David). Working out that the following refers to two different entities is pretty clever... <http://totl.net/> foaf:member<http://users.ecs.soton.ac.uk/cjg/>; dc:license<...>; I can then detect the problem, as it implies the URI is both a document and a group and things can't be both. I can detect the issue, but then what? There'll be lots of situation where the ambiguity is absolute. eg. <http://en.wikipedia.org/wiki/David_%28Michelangelo%29> dc:creator<http://en.wikipedia.org/wiki/Michelangelo> . Did he make the statue or the webpage? I think the other common conflation we'll get is between places & legal entities. eg. "The Royal Society", has both members and a lat/long and people will naturally muddle them, but we'll need a way to unpick that. (I assume) On 13/06/11 14:41, Richard Cyganiak wrote: > On 13 Jun 2011, at 13:02, Christopher Gutteridge wrote: >> Option one is to read that as >> <http://totl.net/> foaf:member<http://<http://users.ecs.soton.ac.uk/cjg/> . >> which is not true > Whether it's true or not is up to the URI owner, because they get to decide what http://totl.net/ identifies. > >> and prevents us making any statements about the documents directly (ie. license, creator, last modified) > How so? Look: > > <http://totl.net/> > foaf:member<http://users.ecs.soton.ac.uk/cjg/>; > dc:license<...>; > dc:creator<...>; > dc:modified "..."^^xsd:date. > > Web pages don't have members and groups of people don't have licenses. Anyone with a minimum of intelligence -- human or machine -- can work that out. > >> What might work better is if you have new predicates which explicitly means<the primary topic of this document has a member who is the primary topic of...> > That would work, and I've used that pattern in the past [1], but try explaining that to someone outside this mailing list or writing it down in JSON. > >> This is more or less what schema.org seems to be doing, if I've understood correctly... > No, they just don't give a damn that the same URI ends up being used for a document and a thing. > > Best, > Richard > > [1] http://vocab.sindice.com/xfn -- Christopher Gutteridge -- http://id.ecs.soton.ac.uk/person/1248 / Lead Developer, EPrints Project, http://eprints.org/ / Web Projects Manager, ECS, University of Southampton, http://www.ecs.soton.ac.uk/ / Webmaster, Web Science Trust, http://www.webscience.org/
Received on Monday, 13 June 2011 15:04:44 UTC