- From: Steve Harris <steve.harris@garlik.com>
- Date: Thu, 12 May 2011 15:14:55 +0100
- To: Ivan Herman <ivan@w3.org>
- Cc: Richard Cyganiak <richard@cyganiak.de>, "RDF-WG public-rdf-wg@w3.org" <public-rdf-wg@w3.org>
Hmmm... I'm hard enough to google for as it is! - Steve On 2011-05-12, at 13:12, Ivan Herman wrote: > Just to clarify: in the course of the discussion we mentioned the alternative of shorter and friendlier, albeit non dereferencable URIs (not replacing the .well-known but as another possibility); I think one idea was to use urn:steveH:XXXXX. Is the intention that we do not go down that line? Just checking... > > Ivan > > P.S. I actually think steveH is a perfect keyword:-) > > > > On May 12, 2011, at 13:47 , Richard Cyganiak wrote: > >> Below is a complete proposal including intro text and detailed wording about the .well-known mechanism, based on a combination of the original proposal from the wiki, and PatH's comments. It's also on the wiki here: >> http://www.w3.org/2011/rdf-wg/wiki/Skolemisation#Updated_Proposal >> >> >> On 28 Apr 2011, at 06:10, Pat Hayes wrote: >>> I would prefer to avoid the "skolem" terminology altogether. >> >> I am fine with avoiding “skolem”. But I believe that *some* term is necessary. First, writing the spec is awkward if one has to repeatedly refer to “an IRI that has been introduced solely to replace a blank node”. Second, I believe that eventually we and others will come to use *some* shorthand term in everyday technical conversation, so why not just bite the bullet and define a term for it in the spec. >> >> I'll stick to “Skolem IRI” for now, until another term has been proposed. I removed mentions of “Skolemization”. >> >>> it really ought to be capitalized, as it is a direct use of the name of Theo Skolem. >> >> Thoralf. I have now capitalized the term. >> >>> It is not clear what is meant by " identifiable by other systems". Identifiable as being skolem URIs? Or in some stronger sense of 'identifiable'? If the former, I suggest the wording "identifiable by other systems as Skolem URIs" >> >> This wording seems fine. I ended up using “recognizable outside of the system boundaries” to avoid “identify” and talking about “systems and other systems”. >> >> The complete proposal is below. >> >> Best, >> Richard >> >> >> PROPOSAL FOR ADDRESSING ISSUE-40 >> >> Add the following in RDF Concepts, Section 6.6 Blank Nodes >> http://www.w3.org/TR/rdf-concepts/#section-blank-nodes >> >> >> 6.6.1 Replacing blank nodes with IRIs >> >> Blank nodes do not have an intrinsic name in the RDF abstract syntax. In situations where such a name is required, implementations MAY systematically replace blank nodes in an RDF graph with IRIs. Systems wishing to do this SHOULD mint a new, globally unique IRI for each blank node. Such IRIs are known as ''Skolem IRIs''. >> >> Systems may wish to mint Skolem IRIs in such a way that they can recognize the IRIs as having been introduced solely to replace a blank node, and map back to the source blank node where possible. >> >> Systems which want Skolem IRIs to be recognizable outside of the system boundaries SHOULD use a well-known IRI [RFC5785] with the registered name “SteveH”. This is an IRI that uses the HTTP or HTTPS scheme, or another scheme that has been specified to use well-known IRIs; and whose path component starts with /.well-known/SteveH/ . >> >> For example, the authority responsible for the domain “example.com” could mint the following recognizable Skolem IRI: >> >> http://example.com/.well-known/SteveH/d26a2d0e98334696f4ad70a677abc1f6 >> >> Note: “SteveH” is a placeholder. Names currently under discussion are “genid”, “bnode”, “skolem”. >> >> Note: RFC 5758 only specifies well-known URIs, not IRIs. For the purpose of this document, a well-known IRI is any IRI that results in a well-known URI after IRI-to-URI mapping [RFC3987]. >> >> > > > ---- > Ivan Herman, W3C Semantic Web Activity Lead > Home: http://www.w3.org/People/Ivan/ > mobile: +31-641044153 > PGP Key: http://www.ivan-herman.net/pgpkey.html > FOAF: http://www.ivan-herman.net/foaf.rdf > > > > > > -- Steve Harris, CTO, Garlik Limited 1-3 Halford Road, Richmond, TW10 6AW, UK +44 20 8439 8203 http://www.garlik.com/ Registered in England and Wales 535 7233 VAT # 849 0517 11 Registered office: Thames House, Portsmouth Road, Esher, Surrey, KT10 9AD
Received on Thursday, 12 May 2011 14:15:34 UTC