pintiniblog - semantic_web

SKOS+semantic web

noreply@blogspirit.com (pintini) — Tue, 15 Sep 2009 22:59:42 +0200

Catalogablog donne des nouvelles du W3C et plus particulièrement de l'association de deux "projets": SKOS (Simple Knowledge Organization System) et le semantic web (linked data):

Semantic web: un moteur de recherche (Yauba)

noreply@blogspirit.com (pintini) — Wed, 09 Sep 2009 21:20:00 +0200

Yauba, recherche sémantique et anonymat

(source: ActuDoc, 29/08/09)

- Recherche sémantique pour affiner les résultats (diminution du bruit)
- Mise en évidence des suggestions de recherche et biographies de personnes connues (cerner un sujet)
- Recherche combinée parmi les sites, images, vidéos, réseaux sociaux, ... (ne plus interroger plusieurs sites)
- Recherche en "temps réel" de sources plus rapidement à jour que Google (indexation du contenu Twitter)

Semantic web: un livre

noreply@blogspirit.com (pintini) — Tue, 08 Sep 2009 19:14:16 +0200

Foundations of Semantic Web Technologies
(Pascal Hitzler, Markus Krötzsch, Sebastian Rudolph, Chapman & Hall/CRC, 2009)

"Semantic Web is a maturing field of technology that continues to be the emphasis of much focused research. This foundational text introduces the standardized knowledge representation languages for modeling ontologies operating at the core of the semantic web. To support the presentation of each language, the authors explain syntax and underlying intuitions through examples, with separate treatment of the underlying formal semantics. They cover RDF Schema, Web Ontology Language (OWL), rules, and query languages, such as SPARQL. The book also presents recent developments concerning the OWL 2 revision and the forthcoming Rule Interchange Format (RIF)."

(source: Planet RDF, 16/08/09)

Web²

noreply@blogspirit.com (pintini) — Tue, 25 Aug 2009 16:40:42 +0200

Le guide des égarés signale cette initiative signée Tim O'Reilly et John Battelle: le web squared [ici] et [ici]:

"[...] un entredeux entre le web 2.0 et l’idéal sémantique des données interconnectées et porteuses de sens. Il s’agit de la rencontre entre les aspirations et les imaginaires de l’internet et la (triste ?) réalité du monde. [...]"

Que peut-on attendre de la "recherche sémantique"?

noreply@blogspirit.com (pintini) — Wed, 01 Jul 2009 22:08:58 +0200

Outils Froids présente: TextRunner un moteur de recherche sémantique pour interroger le web

"TextRunner, mis en ligne récemment par le Department of Computer Science Engineering de l''Université de Washington, nous donne un bel avant-goût de ce que l'on peut attendre de la recherche sémantique.
Il permet en effet d'interroger 500 millions de pages web en utilisant des triplets. Kesako? Le triplet est ce qui va vous permettre de lancer des requêtes plus "intelligentes" que celles permises par les moteurs classiques en vous donnant la possibilité de les structurer un minimum. [...]"

A voir aussi:

Sindice, The semantic web index

"Over 10 billion pieces of reusable information can already be found across 100 million web pages which embed RDF and Microformats."

RDFa: une introduction

noreply@blogspirit.com (pintini) — Mon, 29 Jun 2009 21:22:11 +0200

Introduction to RDFa

"RDFa (“Resource Description Framework in attributes”) is having its five minutes of fame: Google is beginning to process RDFa and Microformats as it indexes websites, using the parsed data to enhance the display of search results with “rich snippets.” Yahoo!, meanwhile, has been processing RDFa for about a year. With these two giants of search on the same trajectory, a new kind of web is closer than ever before.

The web is designed to be consumed by humans, and much of the rich, useful information our websites contain, is inaccessible to machines. People can cope with all sorts of variations in layout, spelling, capitalization, color, position, and so on, and still absorb the intended meaning from the page. Machines, on the other hand, need some help.

A new kind of web—a semantic web—would be made up of information marked up in such a way that software can also easily understand it. Before considering how we might achieve such a web, let’s look at what we might be able to do with it. [...]"

(source: A List Apart / via Catalogablog, 26/06/09)

Common Tag

noreply@blogspirit.com (pintini) — Thu, 25 Jun 2009 19:47:57 +0200

Via JISC Cetis News, voir ce billet sur RDFa à propos des "commong tags":

"Common Tag is an open tagging format defined using RDFa that makes content more discoverable. Unlike free-text tags, Common Tags are references to unique, well-defined concepts, complete with metadata and their own URLs. [...]"

Semantic web 2.0

noreply@blogspirit.com (pintini) — Sat, 20 Jun 2009 19:35:00 +0200

Les technologies du Web sémantique au secours du Web 2.0

"[...] En offrant des mécanismes standardisés de structuration, de mise à disposition, d'échanges et d'interrogation des données à l'échelle du Web, les technologies du Web sémantique permettent de mieux exploiter toutes les données créées et mises à disposition sur le Web et offrent aux utilisateurs un moyen de reprendre le contrôle de leurs données, en leur rendant leur capacité de choix. [...]"

(source: Les petites cases, 18/06/09)

OWL 2: candidat W3C

noreply@blogspirit.com (pintini) — Fri, 19 Jun 2009 21:06:19 +0200

OWL 2 is now a Candidate Recommendation

"The OWL Working Group at W3C invites implementation of its OWL 2 Web Ontology Language. OWL 2 is a compatible extension to OWL 1, providing additional features for people using ontologies. The OWL 2 document set contains 9 technical specifications and 4 instructional documents. The Recommendation-track specifications are now Candidate Recommendations, indicating that the Working Group and the W3C Director believe this is a good time for systems to begin adopting OWL 2 features on an experimental basis. The group maintains a list of implementations and encourages new information about implementations and other feedback to be sent to it comments address. The 4 instructional documents, which provide an introduction to OWL 2, are now at Last Call: overview, primer, new features and rationale, and quick reference. Finally, a new datatype used within both OWL and RIF, called rdf:PlainLiteral (formerly called rdf:text) is also a Candidate Recommendation."

(source: Planet RDF, 16/06/09)

SKOS: recommandation W3C

noreply@blogspirit.com (pintini) — Fri, 19 Jun 2009 21:04:21 +0200

SKOS is a W3C Proposed Recommendation

"The Semantic Web Deployment Working Group has published the Proposed Recommendation of SKOS Simple Knowledge Organization System Reference. SKOS provides a common data model for sharing and linking knowledge organization systems via the Web. SKOS is a vocabulary for expressing the basic structure and content of concept schemes such as thesauri, classification schemes, subject heading schemes, taxonomies, folksonomies, and other similar types of controlled vocabulary. As an application of the Resource Description Framework (RDF), SKOS allows concepts to be composed and published on the World Wide Web, linked with data on the Web and integrated into other concept schemes. Along with this publication of the SKOS Reference Proposed Recommendation the Working Group has published an updated SKOS Primer Working Draft. Comments are welcome through 15 July."

(source: Planet RDF, 16/06/09)