Web sémantique RDF Data & Metadata

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Le web à venir par Tim Berners-Lee. Raw data. Raw datas (also known as primary data) is a term for data collected from a source.

Raw data

Raw data has not been subjected to processing or any other manipulation, and are also referred to as primary data. Raw data is a relative term (see data). Raw data can be input to a computer program or used in manual procedures such as analyzing statistics from a survey. The term can refer to the binary data on electronic storage devices such as hard disk drives (also referred to as low-level data). In computing, raw data may have the following attributes: possibly containing errors, not validated; in different (colloquial) formats; uncoded or unformatted; and suspect, requiring confirmation or citation.

Semantic Web. W3C's Semantic Web logo The Semantic Web is a collaborative movement led by international standards body the World Wide Web Consortium (W3C).[1] The standard promotes common data formats on the World Wide Web.

Semantic Web

By encouraging the inclusion of semantic content in web pages, the Semantic Web aims at converting the current web, dominated by unstructured and semi-structured documents into a "web of data". The Semantic Web stack builds on the W3C's Resource Description Framework (RDF).[2] According to the W3C, "The Semantic Web provides a common framework that allows data to be shared and reused across application, enterprise, and community boundaries. Linked data. An introductory overview of Linked Open Data in the context of cultural institutions.

Linked data

In computing, linked data (often capitalized as Linked Data) describes a method of publishing structured data so that it can be interlinked and become more useful. It builds upon standard Web technologies such as HTTP, RDF and URIs, but rather than using them to serve web pages for human readers, it extends them to share information in a way that can be read automatically by computers. This enables data from different sources to be connected and queried.[1] Tim Berners-Lee, director of the World Wide Web Consortium, coined the term in a design note discussing issues around the Semantic Web project.[2] Principles[edit] Linked Data. What is Linked Data?

Linked Data

The Semantic Web is a Web of Data — of dates and titles and part numbers and chemical properties and any other data one might conceive of. The collection of Semantic Web technologies (RDF, OWL, SKOS, SPARQL, etc.) provides an environment where application can query that data, draw inferences using vocabularies, etc. However, to make the Web of Data a reality, it is important to have the huge amount of data on the Web available in a standard format, reachable and manageable by Semantic Web tools. Furthermore, not only does the Semantic Web need access to data, but relationships among data should be made available, too, to create a Web of Data (as opposed to a sheer collection of datasets).

This collection of interrelated datasets on the Web can also be referred to as Linked Data. W3C Standards. Wiki.dbpedia.org : About. DBpedia is a crowd-sourced community effort to extract structured information from Wikipedia and make this information available on the Web.

wiki.dbpedia.org : About

DBpedia allows you to ask sophisticated queries against Wikipedia, and to link the different data sets on the Web to Wikipedia data. We hope that this work will make it easier for the huge amount of information in Wikipedia to be used in some new interesting ways. Furthermore, it might inspire new mechanisms for navigating, linking, and improving the encyclopedia itself. How RDF Databases Differ from Other NoSQL Solutions - The Datagraph Blog. This started out as an answer at Semantic Overflow on how RDF database systems differ from other currently available NoSQL solutions.

How RDF Databases Differ from Other NoSQL Solutions - The Datagraph Blog

I've here expanded the answer somewhat and added some general-audience context. RDF database systems are the only standardized NoSQL solutions available at the moment, being built on a simple, uniform data model and a powerful, declarative query language. These systems offer data portability and toolchain interoperability among the dozens of competing implementations that are available at present, avoiding any need to bet the farm on a particular product or vendor. In case you're not familiar with the term, NoSQL ("Not only SQL") is a loosely-defined umbrella moniker for describing the new generation of non-relational database systems that have sprung up in the last several years.

What is RDF and what is it good for? Go! (langage de programmation) Un article de Wikipédia, l'encyclopédie libre.

Go! (langage de programmation)

Pour les articles homonymes, voir GO. Go! Est un langage de programmation concurrent, originellement conçu par Keith Clark et Francis McCabe en 2003[1]. Il est orienté vers le besoin de programmer des agents d'applications surs, de qualité de production. Keyword. Heritrix. Un article de Wikipédia, l'encyclopédie libre.


Heritrix a été développé conjointement par Internet Archive et les Bibliothèques Nationales Nordiques en 2003. Sa première publication officielle a eu lieu en janvier 2004, et il a depuis été continuellement amélioré par les membres d'Internet Archive et par des tiers intéressés. Projets utilisant Heritrix[modifier | modifier le code] Un nombre important d'organisations et de bibliothèques nationales utilisent Heritrix, parmi lesquels :

Robot d'indexation. Un article de Wikipédia, l'encyclopédie libre.

Robot d'indexation

Pour les articles homonymes, voir Spider. Fonctionnant sur le même principe, certains robots malveillants (spambots) sont utilisés pour archiver les ressources ou collecter des adresses électroniques auxquelles envoyer des courriels. FR: La nature de la toile ? En rendant les contenus du web lisibles par les machines, le web sémantique bouleverse notre univers informationnel et ouvre de nouvelles opportunités propres à redéfinir la nature du Web : d’un web de document à un web de données.

FR: La nature de la toile ?

(ce billet est issue d’une note de synthèse, réalisée dans le cadre de mes activités universitaires. Il s’agit d’un bilan de lecture autour du web de données. Il m’a semblé intéressant de le republier ici pour solliciter l’avis des connaisseurs de ce sujet, et ouvrir le débat) LinkedData vs Ontology. Metaweb. Over time we’ve improved search by deepening our understanding of queries and web pages. The web isn’t merely words—it’s information about things in the real world, and understanding the relationships between real-world entities can help us deliver relevant information more quickly. Today, we’ve acquired Metaweb, a company that maintains an open database of things in the world.

Working together we want to improve search and make the web richer and more meaningful for everyone. With efforts like rich snippets and the search answers feature, we’re just beginning to apply our understanding of the web to make search better. Introduction à RDFa. Résumé Le Web actuel est conçu essentiellement pour une consommation humaine. Et même lorsque des données interprétables font leur apparition sur le Web, elles sont typiquement distribuées dans un fichier séparé, avec un format séparé et une correspondance très limitée entre les versions homme et machine. FR: Comment publier des données liées. Voici la traduction française complète du tutoriel How to Publish Linked Data on the Web publié par Chris Bizer (Web-based Systems Group, Freie Universität Berlin, Germany), Richard Cyganiak (Web-based Systems Group, Freie Universität Berlin, Germany) et Tom Heath (Knowledge Media Institute, The Open University, Milton Keynes, UK).

Ce document explique la façon de publier des données liées sur le Web. Après un aperçu général de la notion de données liées, plusieurs recettes pratiques sont présentées pour la publication d’information sous forme de données liées sur le Web. JSON to RDF. Sometimes, if you stand in the right place and squint, JSON and RDF line up perfectly. Each time I notice this, I badly want a way to make them line up all the time, no matter where you’re standing. And, actually, I think it’s pretty easy. I’ve seen a few proposals for how to work with RDF data in JSON, but the ones I’ve seen put too much burden on JSON folks to accomodate RDF.

De Web 1.0 à Web 2.0 & Web 3.0. We want raw data now ! Tim Berners Lee au TED, février 2009 Le Web 2.0 n'existe pas et le Web 3.0 n'existera jamais. Le Web est le Web, c'est tout. Toujours le même et changeant sans cesse. LinkedData vs Ontologies. Screencast: DBpedia & W3C Linking Open Data. DBpedia. Linked Data. RDF Web Applications Working Group. Web sémantique : Google, Yahoo et Bing font enfin route commune::Gestion des données. FAQ - schema.org. Semantic Web roadmap. Linked Data - Design Issues. Semantic Web History: Nodes and Arcs 1989-1999 (the WWW Proposal. The Semantic Web - on the respective Roles of XML an.

Métadonnée de photos - Valorisation/Récupération. Web thinkers. Web sémantique.