RDF
Relation Protocol supports the RDF standard.
RDF (Resource Description Framework) is a semantic standard used to describe structured knowledge, which is an international standard published by W3C for knowledge graph. It is a logical and well-developed data model.
The social data in Relation Protocol is written following the RDF standard, including:
The underlying structure of any expression in RDF is a collection of triples, each consisting of a subject, a predicate and an object. A set of such triples is called an RDF graph (defined more formally in section 6). This can be illustrated by a node and directed-arc diagram, in which each triple is represented as a node-arc-node link (hence the term "graph").
Each triple represents a statement of a relationship between the things denoted by the nodes that it links. Each triple has three parts:
The direction of the arc is significant: it always points toward the object.
RDF Schema provides a data-modelling vocabulary for RDF data.
The RDF Schema class and property system is similar to the type systems of object-oriented programming languages such as Java.
An RDF triple contains three components:
the subject, which is an RDF URI reference or a blank node
the predicate, which is an RDF URI reference
the object, which is an RDF URI reference, a literal or a blank node
An RDF triple is conventionally written in the order subject, predicate, object.
The predicate is also known as the property of the triple.
An RDF graph is a set of RDF triples.
The set of nodes of an RDF graph is the set of subjects and objects of triples in the graph.
For example
Alice follow Bob, described by RDF is:
References
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