It involves publishing in languages specifically designed for data: Resource Description Framework ( RDF ), Web Ontology Language ( OWL ), and Extensible Markup Language ( XML ).

* RDF is a simple language for expressing data models, which refer to objects (" resources ") and their relationships.

* Servers which expose existing data systems using the RDF and SPARQL standards.

Specifications such as eRDF and RDFa allow arbitrary RDF data to be embedded in HTML pages.

DBpedia is an effort to publish structured data extracted from Wikipedia: the data is published in RDF and made available on the Web for use under the GNU Free Documentation License, thus allowing Semantic Web agents to provide inferencing and advanced querying over the Wikipedia-derived dataset and facilitating interlinking, re-use and extension in other data-sources.

The Resource Description Framework ( RDF ) is a family of World Wide Web Consortium ( W3C ) specifications originally designed as a metadata data model.

However, in practice, RDF data is often persisted in relational database or native representations also called Triplestores, or Quad stores if context ( i. e. the named graph ) is also persisted for each RDF triple.

In Semantic Web applications, and in relatively popular applications of RDF like RSS and FOAF ( Friend of a Friend ), resources tend to be represented by URIs that intentionally denote, and can be used to access, actual data on the World Wide Web.

The intent of publishing RDF-based ontologies on the Web is often to establish, or circumscribe, the intended meanings of the resource identifiers used to express data in RDF.

Category: RDF data access

For the DBLP data, FacetedDBLP also provides an RDF dump ( using D2R server technology ) as well as an SQL dump based on the underlying mysql database.

* TriG A format for storing and transmitting Resource Description Framework ( RDF ) data.

* XSPARQL is an integrated query language combining XQuery with SPARQL to query both XML and RDF data sources at once ;

The GML specification constrains the semantics of XLinks to be essentially the same as rdf: resource ( from the RDF / XML syntax ) i. e. the referent can logically be placed in-line and the data is still valid.

XDI ( XRI Data Interchange ) is a generalized, extensible service for sharing, linking, and synchronizing structured data over the Internet and other data networks using XRI-addressable RDF graphs.

* TriX ( syntax ), a syntax for Resource Description Framework ( RDF ) data ( a serialization of Resource Description Framework models )

; Any23: Anything To Triples ( any23 ) is a library, a web service and a command line tool that extracts structured data in RDF format from a variety of Web documents.

In the future, tools based on semantic web languages such as Resource Description Framework ( RDF ), the Web Ontology Language ( OWL ) and standardized metadata registry will make data mapping a more automatic process.

Other parts of the standard are being drafted to define bindings of the LOM data model, i. e. define how LOM records should be represented in XML and RDF ( IEEE 1484. 12. 3 and IEEE 1484. 12. 4 respectively ).

The syndicated content an aggregator will retrieve and interpret is usually supplied in the form of RSS or other XML-formatted data, such as RDF / XML or Atom.

SPARQL ( pronounced " sparkle ", a recursive acronym for SPARQL Protocol and RDF Query Language ) is an RDF query language, that is, a query language for databases, able to retrieve and manipulate data stored in Resource Description Framework format.

The model is used in Object Role Modeling ( ORM ), RDF / Notation 3 ( N3 ).

An RDF-based model can be represented in a variety of syntaxes, e. g., RDF / XML, N3, Turtle, and RDFa.

Therefore RDF swaps object for subject that would be used in the classical notation of an Entity – attribute – value model within Object oriented design ; object ( sky ), attribute ( color ) and value ( blue ).

RDF is an abstract model with several serialization formats ( i. e., file formats ), and so the particular way in which a resource or triple is encoded varies from format to format.

However, it is important to distinguish the XML format from the abstract RDF model itself.

Borrowing from concepts available in logic ( and as illustrated in graphical notations such as conceptual graphs and topic maps ), some RDF model implementations acknowledge that it is sometimes useful to group statements according to different criteria, called situations, contexts, or scopes, as discussed in articles by RDF specification co-editor Graham Klyne.

The original GML model was based on the World Wide Web Consortium's Resource Description Framework ( RDF ).

* Editing of RDF ( Resource Description Framework ) a W3C metadata information model

GML's graph model is essentially the same as RDF, on which early versions of GML were based.

In " rebooting " the Robotech storyline, Harmony Gold has apparently opted to abandon the traditional notion of rivalry between the Robotech Defense Force ( RDF ) and the Army of the Southern Cross in favor of a " United Earth Forces " ( UEF ) model.

RIL was implemented briefly in Fourthought's 4Suite Server product, which allowed for persistent storage and querying of an RDF model and associated XML document store.

It also has a capacity to convert substantial portion of the intake into Refuse-derived fuel ( RDF ) materials for further combustion use in several energy consuming industries across Pakistan e. g., in cement manufacturing companies where it is used to heat up the Cement Kiln systems.

* RDF is a simple notation for representing relationships between and among objects

MusicBrainz uses RDF / XML for describing music metadata, which is available for automated processing via HTTP GET and POST methods according to REST architectural style for distributed hypermedia systems.

In addition to the well-publicised involvement in this trade of the Rwandan Defence Force ( RDF ), another important factor in the coltan re-export is that international dealers are under pressure not to buy from the DRC, thus increasing the incentive for DRC coltan to be re-exported as Rwanda's.

RDF is a fundamental standard of the Semantic Web.

* RDF Schema extends RDF and is a vocabulary for describing properties and classes of RDF-based resources, with semantics for generalized-hierarchies of such properties and classes.

A popular vocabulary on the semantic web is Friend of a Friend ( or FOAF ), which uses RDF to describe the relationships people have to other people and the " things " around them.

For example, one way to represent the notion " The sky has the color blue " in RDF is as the triple: a subject denoting " the sky ", a predicate denoting " has the color ", and an object denoting " blue ".

The vocabulary defined by the RDF specification is as follows:

This vocabulary is used as a foundation for RDF Schema where it is extended.