RDF schema is a standard language for creating ontology in RDF. Ontology as a dictionary for defining vocabulary of term
and establish hierarchical relationship between them. RDF schema gives a specific vocabulary for RDF that can be used
to define taxonomies of classes, properties, and domain and range specification for properties [8] [9]. RDF schema models
are also described by node and edge labeled directed graph. RDF and RDFS are written by using XML based syntax.
Figure 4 shows vocabulary and taxonomy for RDFS. The rdfs: type predicate is used to group resources together.