Semantic Web Principles
    Common Models
    
      - To encompass the universe of network-accessible
      information, the Semantic Web must provide a way of exposing
      information from different systems. When looking at a
      possible formulation of a universal Web of semantic
      assertions, the principle of minimalist design requires that
      it be based on a common model of great generality.
      Application or community specific systems may use a variety
      of internal data models so this implies a requirement for
      some generic concept of data at a low level that is in common
      between each system. Only when the common model is general
      can any prospective commuity specific application be mapped
      onto the model.