- From: Kingsley Idehen <kidehen@openlinksw.com>
- Date: Wed, 22 Apr 2009 22:24:45 -0400
- To: David Huynh <dfhuynh@alum.mit.edu>
- CC: public-lod@w3.org
David Huynh wrote: > Kingsley, > > Thanks for the resources and the detailed explanation! Looks like all > the pieces are there! Yes, and if you could be enticed into a generic UI for SPARQL QBE that applies to the Linked Data Web even better :-) Of course, Freebase are Linked Data friendly, so even more of the pieces are in place :-) Kingsley > > David > > Kingsley Idehen wrote: >> David Huynh wrote: >>> Thanks for the link, Juan. >>> >>> Just curious, even if I know SPARQL, how do I (as a new user) know >>> which properties and types there are in the data? And what URIs to >>> use for what? >> David, >> >> Not speaking for Jaun, but seeking to answer the question you posed. >> >> Our iSPARQL interface takes the view that: >> >> 1. You lookup vocabularies and ontologies of interest before >> constructing triple patterns since the terms need to come from somewhere >> 2. You then you use the ontology/vocabulary tree to drag and drop >> classes over Subject and Object nodes >> 3. Do the same thing re. properties by selecting them and dropping >> them over the connectors (predicates) >> 4. Repeat the above until you've completely painted an SPO graph of >> what you seek. >> >> BTW - the pattern in steps 2-4 above originated from RDF Author, and >> we simply adopted it for SPARQL (following a skype session I had with >> Danbri years ago re. the need for SPARQL QBE). Note: RDF Author >> allowed you to write Triples directly into RDF information resources >> via their URLs. Which means the same UI works fine for SPARUL >> (writing to Quad Store via its internal Graph IRI or Web Information >> Resource URL). >> >> Links: >> >> 1. http://rdfweb.org/people/damian/RDFAuthor/Tutorial/ -- RDF Author >> >> Kingsley >>> >>> David >>> >>> Juan Sequeda wrote: >>>> You may want to check out a tool that we are working on: SQUIN >>>> >>>> http://squin.informatik.hu-berlin.de/SQUIN/ >>>> >>>> Juan Sequeda, Ph.D Student >>>> Dept. of Computer Sciences >>>> The University of Texas at Austin >>>> www.juansequeda.com <http://www.juansequeda.com> >>>> www.semanticwebaustin.org <http://www.semanticwebaustin.org> >>>> >>>> >>>> On Wed, Apr 22, 2009 at 9:18 PM, David Huynh <dfhuynh@alum.mit.edu >>>> <mailto:dfhuynh@alum.mit.edu>> wrote: >>>> >>>> Hi all, >>>> >>>> Admittedly this is somewhat of a tease and shameless >>>> self-promotion :-) but I think there are a few interesting >>>> concepts in the query editor for Freebase that I've been working >>>> on that can be very useful for querying and consuming LOD data >>>> sets: >>>> >>>> http://www.freebase.com/app/queryeditor/about >>>> >>>> Or maybe I missed it totally--is there anything similar for >>>> writing SPARQL queries over LOD? >>>> >>>> Cheers, >>>> >>>> David >>>> >>>> >>>> >>> >>> >>> >> >> > > -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen President & CEO OpenLink Software Web: http://www.openlinksw.com
Received on Thursday, 23 April 2009 02:25:24 UTC