Re: Representing NULL in RDF

2013-06-10 Thread Juan Sequeda
I heard somebody saying mapping from RDB to RDF? :) In the RDB2RDF Direct Mapping [1], we do not generate a triple for null values. We also studied the direct mapping in the case that there are null values in our WWW2012 paper [2] [1] http://www.w3.org/TR/rdb-direct-mapping/ [2] http://www2012.w

Re: Business Models, Profitability, and Linked Data

2013-06-10 Thread Kingsley Idehen
On 6/10/13 4:13 PM, Víctor Rodríguez Doncel wrote: El 10/06/2013 16:07, Kingsley Idehen escribió: As I've already stated, the big problem here is wholesale copying and reproduction without attribution. Every data publisher has to deal with this problem, at some point, when crafting a data orie

Re: Business Models, Profitability, and Linked Data

2013-06-10 Thread Víctor Rodríguez Doncel
El 10/06/2013 16:07, Kingsley Idehen escribió: As I've already stated, the big problem here is wholesale copying and reproduction without attribution. Every data publisher has to deal with this problem, at some point, when crafting a data oriented business model. Every data publisher that aggr

Re: Representing NULL in RDF

2013-06-10 Thread Sven R. Kunze
A One could model this piece of information like this: :s rdfs:inapplicableProperty :p. Hmm. What would the semantics of this be? Can you write any entailment rules for it? I imagine this might be one, for example: x rdfs:InapplicableProperty p . x p y . are unsatisfiable (inconsistent), fo

Re: Representing NULL in RDF

2013-06-10 Thread Sven R. Kunze
Zitat von Steve Harris : On 2013-06-09, at 20:36, Pat Hayes wrote: ... - value uknown (it should be there but the source doesn't know it) Actually that piece of information could be written down in a RDF Schema graph like this: It can be written far more simply in RDF just by using a blan

2nd CfP: The 4th Int. Workshop on Consuming Linked Data (COLD 2013) at ISWC 2013

2013-06-10 Thread Olaf Hartig
Call for Papers 4th International Workshop on Consuming Linked Data (COLD2013) 2013 Special Theme: Towards Industrial Linked Data Ecosystems http://db.uwaterloo.ca/cold2013/ Co-located with: 12th International Semantic Web Conf

2nd Call for Participation: CAMP-4-DATA Workshop @ DC-2013

2013-06-10 Thread DCMI Announce
*Apologies for cross-posting* === *2nd Call for Participation: CAMP-4-DATA Workshop @ DC-2013* === Dublin Core-Science and Metadata Community and Research Data Alliance are hosting a day-long Metadata Interest Group workshop, CAMP-4-DATA, on Sept. 6, 2013 in Lisbon, Portugal. The workshop is part

Re: Business Models, Profitability, and Linked Data

2013-06-10 Thread Kingsley Idehen
On 6/10/13 9:06 AM, Leigh Dodds wrote: Hi, On Mon, Jun 10, 2013 at 12:00 PM, Kingsley Idehen wrote: On 6/10/13 4:18 AM, Leigh Dodds wrote: Hi, On Fri, Jun 7, 2013 at 5:52 PM, Kingsley Idehen wrote: There have been a few recent threads on the LOD and Semantic Web mailing lists that boil dow

LD4IE Linked Data for Information Extraction - ISWC2013 workshop - 2nd CFP

2013-06-10 Thread Anna Lisa Gentile
Apologise for multiple posting. *** LD4IE 2013 The 1st international Workshop on Linked Data for Information Extraction Sydney, Australia, October 21 -22, 2013 Workshop website: http://oak.dcs.shef.ac.uk/ld4ie2013/index.html Twitter: @LD4IE2013 #LD4IE

Re: Business Models, Profitability, and Linked Data

2013-06-10 Thread Leigh Dodds
Hi, On Mon, Jun 10, 2013 at 12:00 PM, Kingsley Idehen wrote: > On 6/10/13 4:18 AM, Leigh Dodds wrote: >> >> Hi, >> >> On Fri, Jun 7, 2013 at 5:52 PM, Kingsley Idehen >> wrote: >>> >>> There have been a few recent threads on the LOD and Semantic >>> Web mailing lists that boil down to the fundame

Re: Business Models, Profitability, and Linked Data

2013-06-10 Thread Kingsley Idehen
On 6/10/13 4:26 AM, Víctor Rodríguez Doncel wrote: While attribution may not be hindering any business, it would be nice being able to specify in a machine readable form the way it should be made... Yes. In the case of DBpedia, we do require the exposure of DBpedia URIs in derived content.

Re: Business Models, Profitability, and Linked Data

2013-06-10 Thread Kingsley Idehen
On 6/10/13 4:18 AM, Leigh Dodds wrote: Hi, On Fri, Jun 7, 2013 at 5:52 PM, Kingsley Idehen wrote: There have been a few recent threads on the LOD and Semantic Web mailing lists that boil down to the fundamental issues of profitability, business models, and Linked Data. Situation Analysis

Re: Representing NULL in RDF

2013-06-10 Thread Steve Harris
On 2013-06-09, at 20:36, Pat Hayes wrote: ... >>> - value uknown (it should be there but the source doesn't know it) >> Actually that piece of information could be written down in a RDF Schema >> graph like this: > > It can be written far more simply in RDF just by using a blank node: > > :a :p

Re: Business Models, Profitability, and Linked Data

2013-06-10 Thread Leigh Dodds
Hi, On Mon, Jun 10, 2013 at 9:26 AM, Víctor Rodríguez Doncel wrote: > > While attribution may not be hindering any business, it would be nice being > able to specify in a machine readable form the way it should be made... Yes there's definitely scope to do more there, and something I'm working o

Re: Business Models, Profitability, and Linked Data

2013-06-10 Thread Víctor Rodríguez Doncel
While attribution may not be hindering any business, it would be nice being able to specify in a machine readable form the way it should be made... Víctor El 10/06/2013 10:18, Leigh Dodds escribió: Hi, On Fri, Jun 7, 2013 at 5:52 PM, Kingsley Idehen wrote: There have been a few recent th

Re: Business Models, Profitability, and Linked Data

2013-06-10 Thread Leigh Dodds
Hi, On Fri, Jun 7, 2013 at 5:52 PM, Kingsley Idehen wrote: > There have been a few recent threads on the LOD and Semantic > Web mailing lists that boil down to the fundamental issues of > profitability, business models, and Linked Data. > > Situation Analysis > == > > Business Mod