Conceptual Dependency (CD).

Conceptual Dependency (CD)

This representation is used in natural language processing in order to represent them earning of the sentences in such a way that inference we can be made from the sentences. It is independent of the language in which the sentences were originally stated. CD representations of a sentence is built out of primitives , which are not words belonging to the language but are conceptual , these primitives are combined to form the meaning s of the words. As an example consider the event represented by the sentence.

 In the above representation the symbols have the following meaning:

Arrows indicate direction of dependency

Double arrow indicates two may link between actor and the action

P indicates past tense

ATRANS is one of the primitive acts used by the theory . it indicates transfer of possession

0 indicates the object case relation

R indicates the recipient case relation

Conceptual dependency provides a str5ucture in which knowledge can be represented and also a set of building blocks from which representations can be built. A typical set of primitive actions are

ATRANS - Transfer of an abstract relationship(Eg: give)

PTRANS - Transfer of the physical location of an object(Eg: go)

PROPEL - Application of physical force to an object (Eg: push)

MOVE - Movement of a body part by its owner (eg : kick)

GRASP - Grasping of an object by an actor(Eg: throw)

INGEST - Ingesting of an object by an animal (Eg: eat)

EXPEL - Expulsion of something from the body of an animal (cry)

MTRANS - Transfer of mental information(Eg: tell)

MBUILD - Building new information out of old(Eg: decide)

SPEAK - Production of sounds(Eg: say)

ATTEND - Focusing of sense organ toward a stimulus (Eg: listen)

A second set of building block is the set of allowable dependencies among the conceptualization describe in a sentence.