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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. 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".[2] The term was coined by Tim Berners-Lee for a web of data that can be processed by machines.[3] While its critics have questioned its feasibility, proponents argue that applications in industry, biology and human sciences research have already proven the validity of the original concept.

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. 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. W3C Standards. : About. DBpedia is a crowd-sourced community effort to extract structured information from Wikipedia and make this information available on the Web. : 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. News DBpedia Version 2014 releasedHi all, we are happy to announce the release of DBpedia 2014. DBpedia Spotlight V0.7 releasedDBpedia Spotlight is an entity linking tool for connecting free text to DBpedia through the recognition and disambiguation of entities and concepts from the DBpedia KB. The DBpedia Knowledge Base. 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. These systems tend to be inherently distributed, schema-less, and horizontally scalable. RDF database systems form the largest subset of this last NoSQL category. 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. Keyword. Heritrix. Un article de Wikipédia, l'encyclopédie libre.


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

Robot d'indexation

FR: La nature de la toile ? LinkedData vs Ontology. Metaweb. Introduction à RDFa. Résumé Le Web actuel est conçu essentiellement pour une consommation humaine.

Introduction à RDFa

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. En conséquence, les navigateurs Web ne peuvent fournir qu'une aide minimale aux humains pour l'analyse et le traitement des données web : les navigateurs voient seulement l'information de présentation. Nous introduisons RDFa, qui fournit un ensemble d'attributs XHTML pour prolonger les données visuelles par des indications intelligibles aux machines (machine-readable). Nous montrons comment exprimer des ensembles de données simples et plus complexes avec RDFa, et en particulier comment transformer le texte et les liens intelligibles aux humains (human-readable) en données intelligibles aux machines sans répéter le contenu.

Ce document n'est qu'une introduction à RDFa. FR: Comment publier des données liées. 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. It seems to me we can let JSON keep doing what it does so well, and meanwhile, we can provide bits of RDF which can be adopted when needed.

Instead of pushing RDF on people, allow them to take the parts they find useful. De Web 1.0 à Web 2.0 & Web 3.0. LinkedData vs Ontologies. Screencast: DBpedia & W3C Linking Open Data. DBpedia. DBpedia ( from "DB" for "database" ) is a project aiming to extract structured content from the information created as part of the Wikipedia project.

This structured information is then made available on the World Wide Web.[1] DBpedia allows users to query relationships and properties associated with Wikipedia resources, including links to other related datasets.[2] DBpedia has been described by Tim Berners-Lee as one of the more famous parts of the decentralized Linked Data effort.[3] Background[edit] The project was started by people at the Free University of Berlin and the University of Leipzig, in collaboration with OpenLink Software,[4] and the first publicly available dataset was published in 2007.

It is made available under free licences, allowing others to reuse the dataset. Linked Data. RDF Web Applications Working Group. Current and Upcoming Events Teleconferences: The first Thursday of each month at 10am US Eastern time. An agenda is sent to rdfa-wg 24 hours in advance; minutes follow within a day or two. Will be monitoring comments on any specification or test cases W3C Standards and Notes HTML+RDFa 1.1 (REC) Web sémantique : Google, Yahoo et Bing font enfin route commune. FAQ - What is the purpose of Why are Google, Bing, Yandex and Yahoo! Collaborating? Aren't you competitors? There are lots of schemas out there. Why create a new one? Is a standards body like the W3C or IETF ? How does relate to Facebook Open Graph? Semantic Web roadmap. Up to Design Issues A road map for the future, an architectural plan untested by anything except thought experiments.

This was written as part of a requested road map for future Web design, from a level of 20,000ft. Linked Data - Design Issues. Up to Design Issues. Semantic Web History: Nodes and Arcs 1989-1999 (the WWW Proposal. Initial version: 1999-11-12, Dan Brickley Revised: March 2001 Status: This is a work in progress, and an early release of the document for feedback from the RDF Interest Group.

It is intended as an informal discussion document, and is not a formal publication of any working group, or of the W3C itself. See the Semantic Web Activity pages for information about current W3C work in this area. Although the HTML is valid and the RDF/XML parses successfully with SiRPAC, W3C's Java RDF parser, readers are cautioned that the Javascript demonstration referenced here will only work on some platforms. General comments on this work-in-progress should be sent to the RDF Interest Group; bug reports should be sent to the author. The Semantic Web - on the respective Roles of XML an. BibTeX Bookmark OpenURL Abstract. Métadonnée de photos - Valorisation/Récupération. A l'image de Michel Rolland et de, certainement, beaucoup d'autres, je me suis posé des questions sur la survie de Flick'r au moment de l'offre de rachat de Yahoo ! Par Microsoft.

Même si ces dernières n'ont pas abouti, mes interrogations ne m'ont pas quitté, d'autant plus que Flick'r ne semble pas une priorité de Yahoo !. Or, je préfèrerais récupérer mes données, avant d'être dans la situation que décrit Karl dans ce billet. Web thinkers. Web sémantique.