Knowledge Representation

• Good representation are the key to good problem solving.

• once a problem is described using an appropriate representation, the problem is almost solved.

Good Representation should:

1. make the important objects and relations explicit.

2. they expose natural constraints

3. bring objects and relations together

4. suppress irrelevant details

5. complete, concise and transparent

6. fast and computable

Four fundamental parts of a representation:

1. lexical parts 0 determines which symbols are allowed in the representation's vocabulary.

2. structural parts 0 describes constraints on how the symbols can be arranged.

3. procedural parts 0 specifies access procedures that enable one to create descriptions, modify them and to answer questions.

4. semantic parts 0 establishing meaning with descriptions.

Knowledge Representation Schemes

1. Semantic Nets

2. Frame and Scripts

3. Rules

4. Logic

5. Others