- From: Kingsley Idehen <kidehen@openlinksw.com>
- Date: Wed, 22 Apr 2009 21:50:01 -0400
- To: David Huynh <dfhuynh@alum.mit.edu>
- CC: public-lod@w3.org
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 01:50:43 UTC