AW: Sig.ma - live views on the web of data
Hi guys, fine tool! Up to now I was a bit shy to demonstrate Semantic Web Browsers to end users, and here I see the potential to don't have them scared away. The incremental enrichment of the view is very nice. However it would be great to see our own sources showing up firsthand. Is there a possiblity to influence the order in which sources are searched? One Suggestion: It would be great to have an option (maybe even as default for new users) to show the labels instead or in front of the URIs, prefered language according to browser settings. If a skos:prefLabel is available, this one could be the best choice. Cheers, Joachim -Ursprüngliche Nachricht- Von: public-lod-requ...@w3.org [mailto:public-lod-requ...@w3.org] Im Auftrag von Giovanni Tummarello Gesendet: Donnerstag, 23. Juli 2009 02:58 An: semantic-web at W3C; Linking Open Data Betreff: Sig.ma - live views on the web of data Dear Web of Data enthusiasts, we are very happy to share with you today the first public version of Sigma, http://sig.ma , a browser, a mashup engine and an API for the web of data. here is blog post with screencast, sample sigma embedded mashup etc. http://blog.sindice.com/2009/07/22/sigma-live-views-on-the-web -of-data/ Sig.ma is heavily based on Sindice but also takes important hints from Yahoo BOSS, the OKKAM service and likely several others soon cheers Giovanni, also on behalf of all - Michele Catasta, Richard Cyganiak and Szymon Danielczyk who worked specifically on this but also .. and of the Data Intensive Infrastructure Group, DERI as a whole. http://di2.deri.ie/team/
Re: Sig.ma - live views on the web of data
Nice work!
Re: Merging Databases
Hello, Trying to add some explanation wrt. the SKOS vocabulary, hoping not to conflict with Pat's clarifications ;-) For skos:exactMatch, the SKOS reference says [1]: The property skos:exactMatch is used to link two concepts, indicating a high degree of confidence that the concepts can be used interchangeably across a wide range of information retrieval applications So there can be substitution. But, contrary to what happens with owl:sameAs, this substitution is not automatic for *all* RDF triples the concept would be involved in. Actually it is left to implementers or ontology provider to define in which context two exactly equivalent concepts may be substituted. As a (fictious!) result, one concept may be substituted by another if it is the object of a dc:subject statement, but not if it is the subject of a dc:creator statement. The idea was really to be able to state some form of semantic equivalence that would be less committing than the RDF/OWL one. Now, skos:exactMatch is transitive, which means that if a concept X in one vocabulary has been mapped to Y in a second vocabulary, and Y is connected to Z in a third vocabulary, then X and Z can be substituted. This can (and will) be useful, but may be also harmful if the two mappings were created with different application concerns in mind, and that negligible semantic differences over a one-step mapping add up to a bigger lap over a longer path. closeMatch is meant to deal with a lesser level of commitment. As written in the SKOS Primer, skos:closeMatch is not defined as transitive, which prevents such similarity assessments to propagate beyond these two schemes. Imagine that for a specific application you are creating mappings between two vocabularies. You can thus create these mappings without bother with the possibility that these links may cause dubious substitutions for a different applications. SKOS has also other mapping properties, esp. a skos:relatedMatch could be the anchor for the more specialized properties that Alan has in OBO. This skos:relatedMatch has really not much semantics (even informal ones) but I feel it would still be better than rdfs:seeAlso. According to RDFS spec [3] The property rdfs:seeAlso specifies a resource that might provide additional information about the subject resource. As far as I understand it (and keeping to the distinctions made e.g. in [4]) this means that rdfs:seeAlso can connect a non-document resource to an information resource, which I feel is a bit too broad for Alan's case... Cheers, Antoine [1] http://www.w3.org/TR/skos-reference/#mapping [2] http://www.w3.org/TR/skos-primer/#secmapping [3] http://www.w3.org/TR/2000/CR-rdf-schema-2327/#s2.3.4 [4] http://www.w3.org/TR/cooluris/#distinguishing On Jul 21, 2009, at 7:26 PM, Alan Ruttenberg wrote: On Tue, Jul 21, 2009 at 1:23 PM, Toby Inkstert...@g5n.co.uk wrote: On Tue, 2009-07-21 at 19:52 +0300, Bernhard Schandl wrote: I would say: Never assert sameAs. It's just too big a hammer. Instead use a wider palette of relationships to connect entities to other ones. which ones would you recommend? skos:exactMatch = asserts that the two resources represent the same concept Say, refer to the same thing. , but does not assert that all triples containing the first resource are necessarily true when the second resource is substituted in. I'm having trouble parsing this one. I don't know what concepts are, but they are an odd sort of thing if they can be the same, but can't be substituted. This is exactly what is needed in many cases. Philosophical terminology is that they have the same referent but not the same sense, and lack of substitutability reflects the unfortunate but inevitable fact that the Web as a whole is not referentially transparent (yet). More mundane example, the same person might need to be referred to in one way in one context and differently in another, just because the two social contexts require different forms of address. (That example from Lynn Stein.) In any case, this isn't much better when the issue I point out is that there is a specific relation between e.g. the intervention and the drug - that relation is no where near equivalence in any form. True, but in cases like this, it is simply a basic conceptual mistake to be using any kind of loose-sameAs property. rdf:seeAlso would be more like what is needed for linking a drug to an intervention. I agree with you about having a selection of better-thought-out relations rather than just using sameAs as a kind of all-purpose knee-jerk connecting link. Maybe this Linked Data slogan has a rather dumbing-down effect, as it suggests that 'link' is a simple uniform notion that works in all cases. skos:closeMatch = same as exact match, but slightly woolier. Seems harmless, assuming one doesn't mind whatever one is dealing with typed a concept. Ditto the broader and narrower relations, which although not to my taste
Re: Sig.ma - live views on the web of data
Really great. I've used sig.ma to power a linked data profile searcher, that I've been toying with ... http://openprofile.com/ I'll be adding more linked data sources, over time... On Thu, Jul 23, 2009 at 2:58 AM, Giovanni Tummarellogiovanni.tummare...@deri.org wrote: Dear Web of Data enthusiasts, we are very happy to share with you today the first public version of Sigma, http://sig.ma , a browser, a mashup engine and an API for the web of data. here is blog post with screencast, sample sigma embedded mashup etc. http://blog.sindice.com/2009/07/22/sigma-live-views-on-the-web-of-data/ Sig.ma is heavily based on Sindice but also takes important hints from Yahoo BOSS, the OKKAM service and likely several others soon cheers Giovanni, also on behalf of all - Michele Catasta, Richard Cyganiak and Szymon Danielczyk who worked specifically on this but also .. and of the Data Intensive Infrastructure Group, DERI as a whole. http://di2.deri.ie/team/
Re: Sig.ma - live views on the web of data
Very very nice Giovanni, congratulations to all the group. Cheers D -- Daniel Schwabe Tel:+55-21-3527 1500 r. 4356 Fax: +55-21-3527 1530 http://www.inf.puc-rio.br/~dschwabe Dept. de Informatica, PUC-Rio R. M. de S. Vicente, 225 Rio de Janeiro, RJ 22453-900, Brasil Giovanni Tummarello wrote: Dear Web of Data enthusiasts, we are very happy to share with you today the first public version of Sigma, http://sig.ma , a browser, a mashup engine and an API for the web of data. here is blog post with screencast, sample sigma embedded mashup etc. http://blog.sindice.com/2009/07/22/sigma-live-views-on-the-web-of-data/ Sig.ma is heavily based on Sindice but also takes important hints from Yahoo BOSS, the OKKAM service and likely several others soon cheers Giovanni, also on behalf of all - Michele Catasta, Richard Cyganiak and Szymon Danielczyk who worked specifically on this but also .. and of the Data Intensive Infrastructure Group, DERI as a whole. http://di2.deri.ie/team/
Re: Sig.ma - live views on the web of data
Hi, Nice service. I like how the descriptions are progressively enhanced. As is usual with a new search engine I instantly did a vanity search. Somehow it seems to have merged me with my children, wife and parents. I think the data is all correct, so perhaps some over-aggressive smushing in there somewhere? Cheers, L. 2009/7/23 Giovanni Tummarello giovanni.tummare...@deri.org: Dear Web of Data enthusiasts, we are very happy to share with you today the first public version of Sigma, http://sig.ma , a browser, a mashup engine and an API for the web of data. here is blog post with screencast, sample sigma embedded mashup etc. http://blog.sindice.com/2009/07/22/sigma-live-views-on-the-web-of-data/ Sig.ma is heavily based on Sindice but also takes important hints from Yahoo BOSS, the OKKAM service and likely several others soon cheers Giovanni, also on behalf of all - Michele Catasta, Richard Cyganiak and Szymon Danielczyk who worked specifically on this but also .. and of the Data Intensive Infrastructure Group, DERI as a whole. http://di2.deri.ie/team/ __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ -- Leigh Dodds Programme Manager, Talis Platform Talis leigh.do...@talis.com http://www.talis.com
VoCamp, creating new vocabularies, Nice, France, 24th and 25th September 2009
The 10th VoCamp and the first in France will take place in Nice on the French Riviera the 24th and 25th September 2009. VoCamp is a series of free informal events where people can spend some time creating and maintaining lightweight vocabularies/ontologies/thesauruses for the Semantic Web/Web of Data/Linked Open Data. (see http://vocamp.org/ ) The VoCamp idea is influenced by BarCamp but is oriented to hands-on technical work and practical outputs to publish new vocabularies. The emphasis of the events is not on creating the perfect ontology in a particular domain, but on creating vocabularies that are good enough for people to start using for publishing data on the Web. VoCamps are free for participants. Sign up by going to the website (attendance is limited to 30 people at the moment so be quick): http://vocamp.org/wiki/VoCampNiceSeptember2009 -- Fabien - http://fabien.info
AW: Sig.ma - live views on the web of data
Congratulations, very impressive and well suited to demonstrate the benefit of semantic web. Greetings, Felix -Ursprüngliche Nachricht- Von: semantic-web-requ...@w3.org [mailto:semantic-web-requ...@w3.org] Im Auftrag von Giovanni Tummarello Gesendet: Donnerstag, 23. Juli 2009 02:58 An: semantic-web at W3C; Linking Open Data Betreff: Sig.ma - live views on the web of data Dear Web of Data enthusiasts, we are very happy to share with you today the first public version of Sigma, http://sig.ma , a browser, a mashup engine and an API for the web of data. here is blog post with screencast, sample sigma embedded mashup etc. http://blog.sindice.com/2009/07/22/sigma-live-views-on-the-web-of-data/ Sig.ma is heavily based on Sindice but also takes important hints from Yahoo BOSS, the OKKAM service and likely several others soon cheers Giovanni, also on behalf of all - Michele Catasta, Richard Cyganiak and Szymon Danielczyk who worked specifically on this but also ... and of the Data Intensive Infrastructure Group, DERI as a whole. http://di2.deri.ie/team/
