- Semantic networks,
- Frames,
- First order logic, and
- Rule-based systems.
Semantic Networks
Semantic Netword representations provide a structured knowledge representation. In such a network, parts of knowledge are clustered into semanic groups. In semantic networds, the concepts and entities/objects of the problem domain are represented by nodes and relationships between these entities are shown by arrows, generally, by directed arrows. in view of the fact that semanitc network representation is a pictorial depiction of objects, their atttributes and the relationships that exist between these objects and other entities. A semantic net is just a graph, where the nodes in th graph represent concepts, and the arcs are labeled and represent binary relationships between concepts. these networks provide a more natural way, as compared to other representation schemes, for mapping to and from a natural language.
