- From: David Huynh <dfhuynh@alum.mit.edu>
- Date: Wed, 22 Apr 2009 18:59:24 -0700
- To: Kingsley Idehen <kidehen@openlinksw.com>
- CC: public-lod@w3.org
Kingsley, Thanks for the resources and the detailed explanation! Looks like all the pieces are there! 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 >>> >>> >>> >> >> >> > >
Received on Thursday, 23 April 2009 02:00:02 UTC