These are used as filters in the WHERE part and can include variables and constants for subjects, predicates, and objects.
Each statement is formed as a triple: subject, predicate, and object.
The structure of RDF is in the form of statements with familiar grammatical constructs like subject, predicate, and object.
An example is the connection of an author and a book using a triple consisting of subject, predicate and object.
The result is stored as a tree object and is then traversed and parsed to separate the subject, predicate and object.
Each piece of information is represented as a triple: subject, predicate and object.
Each triple is modeled in the form of subject, predicate and object.
RDF [81] is based on XML and describes data based on a graph model consisting of triples of subject, predicate and object.
The annotations thus form triples of subject, predicate, and object, where the subject is either a fundamental data resource from the NeXML document such as a tree, character state matrix, or taxon; or, transitively, the object of another triple.
RDF is a machine-readable data representation language based on the 'triple', that is, data is codified in a subject predicate object structure (e.g. 'Cyclin participates in Cell cycle', Fig. 1 ), in which the predicate and object ('participates in' and 'Cell cycle', respectively) describe a property of the subject ('Cyclin') [ 3 ].
