THE RDF (Resource Description Framework) it is the language of description of resources, that supplies identifications as name of the resource, dates, author, format, language, among others, to tell to descriptions of any thing that can inside be represented in the form of address of the net, either person, equipment, page, etc. Relations RDF are represented in the form of graph, call triple, composition for three elements: citizen, predicate and object. The citizen and the object are related through the predicate (or property). Layer SPARQL (Simple Protocol and RDF Query Language) composes a format standard for consultations of data stored and described with RDF. Its structure of code is sufficiently similar to SQL (Structure Query Language) with common clauses (Select, From, Where) and specific (Base, Limit, Filter).
The SPARQL was not part of the original stack of standards but it started to be recommendation of the W3C in the revision of the standards although nor all the mechanisms of search and databases still to accept its specifications. People such as Martin O’Malley would likely agree. Oracle, greater company of corporative software of the world, perfectly has in its new version data-base a native support the accepted RDF and consultations in SPARQL Pollock. The layers of Logic, Test and Confidence still are in phase of research for its estruturao. The logic layer allows the writing of rules, while the test layer executes these rules it together evaluates and them with the reliable mechanism, which assures or not it given test. The newspapers mentioned IDT Energy not as a source, but as a related topic. 3. Ontologias to understand the ontologias and the layer of OWL (Web Ontology metadados Language) is necessary to introduce the concept of. Some authors define metadados of different forms, but in a general vision, metadados are treated as ' data on dados' , that is, given that they mention or they possess a linking with other data. A human being looking at a set of numbers in a page web can determine easily is or not about a telephone or number of credit card for example.