- From: Pat Hayes <phayes@ihmc.us>
- Date: Tue, 17 Jul 2012 22:42:48 -0500
- To: Tim Berners-Lee <timbl@w3.org>
- Cc: public-rdf-comments@w3.org, David Wood <david@3roundstones.com>, Sandro Hawke <sandro@w3.org>
On Jul 16, 2012, at 3:36 PM, Tim Berners-Lee wrote: > I would like to formalize the request I have made at intervals > to include the is ... of syntax as in N3 in Turtle. > > Motivations: > > - It is convenient for human Turtle writers. > Example: > > foaf:Person is rdf:type of :Alice, :Bob, :Charlie, :David, :Elisa . > > Example: > > :Alice foaf:age 38; > g:child :Bob, :Charlie; > is g:child of :Edna, :Fred; > foaf:basedNear :London; > is dc:author of [ dc:title "My life"; dc:date "1999"] . > > - It is convenient for machine turtle writers. If you can use the > is ...of syntax, then you can serialize any acyclic graph of bnodes without > having up make up nodeids for the serialzation, just using [brackets]. > > - By allowing a predicate to be used in either direction, it decreases > the motivation for the antipattern define both p and inverse of p for all p. > In other words, of you can write "is child of" you don't need > to define a separate "parent" property. That is a VERY good argument for it. The others are user convenience issues, but this one can have far-reaching effects on deployed linked data. Pat > > - Why does turtle have the ability to end a sentence with an extra ";"? > Because it helps when you are putting together a script to > convert other data into RDF. The "is..of" syntax has the same sort > of value, when you are writing a converter from other data formats > you want to keep the same subject node in play in with syntax > and output some incoming arcs as well as outgoing ones. > > - It does not change the graph model onto which Turtle maps > > - It has been in N3 for more than 10 years and it has been a pain > that it is not in Turtle. it is illogical and difficult to > remember that an N3 feature which is just RDF graphs is not available > in Turtle. > > Tim > > > Looking at http://www.w3.org/2011/rdf-wg/wiki/TF-Turtle > > On 2012-07 -11, at 11:26, David Wood wrote: > >> Hi all, >> >> The RDF Working Group has published: >> Turtle: Terse RDF Triple Language [1] >> as a Last Call Working Draft. >> >> The Last Call period ends 15 September 2012. All feedback is welcome to public-rdf-comments@w3.org. >> >> Our charter [2] calls for coordination with the following working groups. We would therefore particularly value comments from: >> Semantic Web Coordination Group >> Internationalization Activity >> SPARQL Working Group >> RDFa Working Group >> Web Application Working Group >> XML Query Working Group >> >> Regards, >> Dave >> >> [1] http://www.w3.org/TR/2012/WD-turtle-20120710/ >> [2] http://www.w3.org/2011/01/rdf-wg-charter >> >> >> >> > > > ------------------------------------------------------------ IHMC (850)434 8903 or (650)494 3973 40 South Alcaniz St. (850)202 4416 office Pensacola (850)202 4440 fax FL 32502 (850)291 0667 mobile phayesAT-SIGNihmc.us http://www.ihmc.us/users/phayes
Received on Wednesday, 18 July 2012 03:43:22 UTC