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RDF is a directed graph composed of triple statements. An RDF graph statement is represented by: (1) a node for the subject, (2) an arc from subject to object, representing a predicate, and (3) a node for the object. Each of these parts can be identified by a Uniform Resource Identifier (URI). An object can also be a literal value.
A semantic triple, or RDF triple or simply triple, is the atomic data entity in the Resource Description Framework (RDF) data model. [1] As its name indicates, a triple is a sequence of three entities that codifies a statement about semantic data in the form of subject–predicate–object expressions (e.g., "Bob is 35", or "Bob knows John").
(Turtle examples are also valid Notation3). The example encodes an RDF graph made of four triples, which express these facts: The W3C technical report on RDF syntax and grammar has the title RDF/XML Syntax Specification (Revised). That report's editor is a certain individual, who in turn Has full name Dave Beckett. Has a home page at a certain ...
RDF Schema (Resource Description Framework Schema, variously abbreviated as RDFS, RDF(S), RDF-S, or RDF/S) is a set of classes with certain properties using the RDF extensible knowledge representation data model, providing basic elements for the description of ontologies. It uses various forms of RDF vocabularies, intended to structure RDF ...
To enable the encoding of semantics with the data, technologies such as Resource Description Framework (RDF) [2] and Web Ontology Language (OWL) [3] are used. These technologies are used to formally represent metadata. For example, ontology can describe concepts, relationships between entities, and categories of things.
A triplestore or RDF store is a purpose-built database for the storage and retrieval of triples [1] through semantic queries. A triple is a data entity composed of subject – predicate – object , like "Bob is 35" (i.e., Bob's age measured in years is 35) or "Bob knows Fred".
RDF - graph based data model standardized by W3C, includes 7 standard serializations, N-Triples, N-Quads, Turtle, TriG, RDF/XML, JSON-LD and RDFa; RSS – syndication; SDXF – the Structured Data eXchange Format; SFV – checksum format; Thing Description – file format for W3C Web of Things data models; TrueCrypt – discontinued container ...
Example of a blank node in a RDF graph. In RDF, a blank node (also called bnode) is a node in an RDF graph representing a resource for which a URI or literal is not given. [1] The resource represented by a blank node is also called an anonymous resource. According to the RDF standard a blank node can only be used as subject or object of an RDF ...