The Linking Open Data cloud diagram
Linked Data: Evolving the Web into a Global Data Space
Open data
An introductory overview of Linked Open Data in the context of cultural institutions. Clear labeling of the licensing terms is a key component of Open data, and icons like the one pictured here are being used for that purpose. Overview[edit] The concept of open data is not new; but a formalized definition is relatively new—the primary such formalization being that in the Open Definition which can be summarized in the statement that "A piece of data is open if anyone is free to use, reuse, and redistribute it — subject only, at most, to the requirement to attribute and/or share-alike Open data is often focused on non-textual material[citation needed] such as maps, genomes, connectomes, chemical compounds, mathematical and scientific formulae, medical data and practice, bioscience and biodiversity. A typical depiction of the need for open data: Creators of data often do not consider the need to state the conditions of ownership, licensing and re-use. I want my data back. Closed data[edit]
Describing Copyright in RDF - Creative Commons Rights Expression Language
Watson Semantic Web Search
This is the Watson Web interface for searching ontologies and semantic documents using keywords. This interface is subject to frequent evolutions and improvements. If you want to share your opinion, suggest improvement or comment on the results, don't hesitate to contact us... At the moment, you can enter a set of keywords (e.g. "cat dog old_lady"), and obtain a list of URIs of semantic documents in which the keywords appear as identifiers or in literals of classes, properties, and individuals. Search options allow you to restrict the search space to particular types of entities (classes, properties or individuals) and to particular elements within the entities (local name, label, comment or any literal). Navigation in the results follows very simple principles. sign appears, it can be used to display additional information about the element it is attached with.
DATOS.GOB.MX
RDFa Primer
We begin the introduction to RDFa by using a subset of all the possibilities called RDFa Lite 1.1 [rdfa-lite]. The goal, when defining that subset, was to define a set of possibilities that can be applied to most simple to moderate structured data markup tasks, without burdening the authors with additional complexities. Many Web authors will not need to use more than this minimal subset. 2.1.1 The First Steps: Adding Machine-Readable Hints to Web Pages Consider Alice, a blogger who publishes a mix of professional and personal articles at We will construct markup examples to illustrate how Alice can use RDFa. 2.1.1.1 Hints on Social Networking Sites Alice publishes a blog and would like to provide extra structural information on her pages like the publication date or the title. Example 1 <html><head> ... This information is, however, aimed at humans only; computers need some sophisticated methods to extract it. Example 2 <html><head> ... Example 3 Example 4 Example 5
SWSE
¿Qué son los datos abiertos? — Open Data Handbook
Este manual es sobre “Datos Abiertos” pero ¿Qué es exactamente Datos Abiertos? En particular ¿Qué hace a los Datos Abiertos “Abiertos”? ¿De qué tipo de datos hablamos? ¿Qué significa abierto? Este manual es sobre “Datos Abiertos” pero ¿Qué es exactamente Datos Abiertos? Los datos abiertos son datos que pueden ser utilizados, reutilizados y redistribuidos libremente por cualquier persona, y que se encuentran sujetos, cuando más, al requerimiento de atribución y de compartirse de la misma manera en que aparecen. La definición de apertura completa da detalles precisos de lo que significa. Disponibilidad y acceso: la información debe estar disponible como un todo y a un costo razonable de reproducción, preferiblemente descargándola de internet. Si te estás preguntando por qué es tan importante ser claros respecto de lo que significa ser “Abierto” y por qué se usa esta definición, hay una respuesta simple: interoperabilidad. Enfrentamos una situación similar en relación con los datos.
RDFa, Drupal and a Practical Semantic Web
In the march toward creating the semantic web, web content management systems such as Drupal (news, site) and many proprietary vendors struggle with the goal of emitting structured information that other sites and tools can usefully consume. There's a balance to be struck between human and machine utility, not to mention simplicity of instrumentation. With RDFa (see W3C proposal), software and web developers have the specification they need to know how to structure data in order to lend meaning both to machines and to humans, all in a single file. And from what we've seen recently, the Drupal community is making the best of it. Introducing RDFa RDFa is a set of XHTML attributes meant in particular to augment visual data with machine-readable hints. Actually, RDFa goes beyond this, providing somewhat of a circular benefit. RDFa, RDF, XML and XHTML Okay, too many acronyms you say? RDFa is based upon the principles of RDF. The Heart of RDF RDF in Action <? RDFa is Much Simpler Than RDF
SweoIG/TaskForces/CommunityProjects/LinkingOpenData - ESW Wiki
News 2014-12-03: The 8th edition of the Linked Data on the Web workshop will take place at WWW2015 in Florence, Italy. The paper submission deadline for the workshop is 15 March, 2015. 2014-09-10: An updated version of the LOD Cloud diagram has been published. The new version contains 570 linked datasets which are connected by 2909 linksets. Project Description The Open Data Movement aims at making data freely available to everyone. The goal of the W3C SWEO Linking Open Data community project is to extend the Web with a data commons by publishing various open data sets as RDF on the Web and by setting RDF links between data items from different data sources. RDF links enable you to navigate from a data item within one data source to related data items within other sources using a Semantic Web browser. The figures below show the data sets that have been published and interlinked by the project so far. Clickable version of this diagram. Project Pages Meetings & Gatherings See Also Demos 1. 2.
Using Dublin Core - The Elements
NOTE: This text was last revised in 2005. As of 2011, a completely revised User Guide is being developed at the wiki page DCMI's Glossary and FAQ are also under revision. This section lists each element by its full name and label. In the element descriptions below, a formal single-word label is specified to make the syntactic specification of elements simpler for encoding schemes. Some information may appear to belong in more than one metadata element. 4.1. Label: Title Element Description: The name given to the resource. Guidelines for creation of content: If in doubt about what constitutes the title, repeat the Title element and include the variants in second and subsequent Title iterations. Examples: Title="A Pilot's Guide to Aircraft Insurance" Title="The Sound of Music" Title="Green on Greens" Title="AOPA's Tips on Buying Used Aircraft" 4.2. Label: Subject and Keywords Element Description: The topic of the content of the resource. 4.3.
