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    Publicado el 12.11.2012 por Equipo GNOSS

    SPARQL 1.1: Proposed Recommendation

    El grupo W3C SPARQL Working Group ha publicado SPARQL 1.1 como Proposed Recommendation. Tras el exito de SPARQL 1.0, SPARQL 1.1 es un estándar complete para trabajar con datos RDF que incluye lenguaje de consulta y actualización, dos protocolos HTTP, resultados en tres formatos, y otras características explotandos los puntos SPARQL. La mayoría de las características de SPARQL 1.1 han sido ya implementadas por varios proveedores como muestra la siguiente tabla.

    The Proposed Recommendations are:

    1. SPARQL 1.1 Overview - Overview of SPARQL 1.1 and the SPARQL 1.1 documents
    2. SPARQL 1.1 Query Language - A query language for RDF data.
    3. SPARQL 1.1 Update - Specifies additions to the query language to allow clients to update stored data
    4. SPARQL 1.1 Query Results JSON Format - How to use JSON for SPARQL query results
    5. SPARQL 1.1 Query Results CSV and TSV Formats - How to use comma-separated values (CVS) and tab-separated values (TSV) for SPARQL query results
    6. SPARQL Query Results XML Format - How to use XML for SPARQL query results. (This contains only minor, editorial updates from SPARQL 1.0, and is actually a Proposed Edited Recommendation.)
    7. SPARQL 1.1 Federated Query - an extension of the SPARQL 1.1 Query Language for executing queries distributed over different SPARQL endpoints.
    8. SPARQL 1.1 Service Description - a method for discovering and a vocabulary for describing SPARQL services.

    The following are Candidate Recommendations, as the group still seeks more feedback from implementors:

    1. SPARQL 1.1 Entailment Regimes - defines the semantics of SPARQL queries under entailment regimes such as RDF Schema, OWL, or RIF.
    2. SPARQL 1.1 Protocol for RDF - A protocol defining means for conveying arbitrary SPARQL queries and update requests to a SPARQL service.
    3. SPARQL 1.1 Graph Store HTTP Protocol - As opposed to the full SPARQL protocol, this specification defines minimal means for managing RDF graph content directly via common HTTP operations.

    The group has also produced a test suite and a page on using SPARQL 1.1 with RDF 1.1.



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    Publicado el 23.5.2012 por Equipo GNOSS

    Introducción a la Web semántica

    Introducción a la Web semántica en la cual se tratan los siguientes temas:

    • Necesidad de la Web semántica
    • Capas de la Web semántica
    • Ontologías
    • Aplicaciones: Linked Data, Open government data, semantic live science, semantic annotation, semantic search
    • Herramientas: editores de ontologías, APIS, triplestores, razonadores


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    Publicado el 27.1.2010 por Equipo GNOSS

    Semantic Web Standards Wiki

    W3C cuenta con un nuevo sitio Wiki, llamado "Semantic Web Standards Wiki" (SWSWiki). No es su objetivo superponerse a otras comunidades Wiki como Semanticweb.org o WLED Wiki;sino proporcionar un punto de partida para tener más información sobre las tecnologías de la Web Semántica, en particular sobre los Estándares de la Web Semántica del W3C.

    A new public wiki site has been set up at W3C, nicknamed “Semantic Web Standards Wiki” or SWSWiki. It is not the goal of this wiki to supersede other community wikis like Semanticweb.org or OWLED Wiki; instead it is to provide a “first stop” for more information on Semantic Web technologies, in particular on Semantic Web Standards published by the W3C. Communities around such standards are also welcome to use the Wiki for their purpose; as an example, and thanks to Antoine Isaac, the SKOS community has already begun creating its own specific pages. Essentially, the role of this Wiki is to be an alternative (and, at some point in the future, maybe a replacement) to the ESW Wiki at W3C, but concentrating on Semantic Web only and using Semantic Media Wiki as an underlying technology.

    In addition to the classic “Web of documents” W3C is helping to build a technology stack to support a “Web of data”, the sort of data you find in databases. The ultimate goal of the Web of data is to enable computers to do more useful work and to develop systems that can support trusted interactions over the network. The term “Semantic Web” refers to W3C’s vision of the Web of linked data. Semantic Web technologies enable people to create data stores on the Web, build vocabularies, and write rules for handling data. Linked data are empowered by technologies such as RDF, SPARQL, OWL, and SKOS.