Issues in Knowledge Representation
The issues in Knowledge representation are: Are there any attributes of the object which are so basic that they have occurred in almost every problem domain. Are there any important relationships that exist among the different attributes of objects. At what level should the knowledge is represented and what are the primitives. How should the set of objects be represented? How can the relevant part of the information can be accessed when they are required.
Summary
The issues in Knowledge representation are: Are there any attributes of the object which are so basic that they have occurred in almost every problem domain. Are there any important relationships that exist among the different attributes of objects. At what level should the knowledge is represented and what are the primitives. How should the set of objects be represented? How can the relevant part of the information can be accessed when they are required.
Things to Remember
- There are certain issues in Knowledge representation and they are listed below.
- Are there any attributes of the object which are so basic that they have occurred in almost every problem domain.
- Are there any important relationships that exist among the different attributes of objects.
- At what level should the knowledge is represented and what are the primitives. How should the set of objects be represented?
- How can the relevant part of the information can be accessed when they are required.
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Issues in Knowledge Representation
Issues in Knowledge Representation
There are different issues which are involved in knowledge representation system. These issues can regard the following issues:
- Are there any attributes of an object which are so basic that they have occurred in almost every problem domain?
There are two "instance" and "is" and each is important because each supports property inheritance. - Are there any important relationships that exist among the different attributes of objects?
band(John Zorn,Naked City)
This can be treated as John Zorn plays in the band Naked City or John Zorn's band is Naked City.
Another representation is band = Naked City.
band-members = John Zorn, Bill Frissell, Fred Frith, Joey Barron,... - At what level should the knowledge be represented and what are the primitives?
Choosing the Granularity of Representation Primitives are fundamental concepts such as holding, seeing, playing and as English is a very rich language with over half a million words it is clear we will find difficulty in deciding upon which words to choose as our primitives in a series of situations.
If Sam feels a dog then it could become:
feeds(Som, dog).
If Sam gives the dog a bone like:
gives(tom, dog,bone).
Are these the same?
In any sense does giving an object food constitute feeding?
If give(x, food) →feed(x) then we are making progress.But we need to add certain inferential rules.
- How should the set of objects be represented?
- How can the relevant part of the information can be accessed when they are required?
References:
- Elaine Rich, Kevin Knight 1991, "Artificial Intelligence".
- Nilsson, Nils J. Principles of Artificial Intelligence, Narosa Publishing House New Delhi, 1998.
- Norvig, Peter & Russel, Stuart Artificial Intelligence: A modern Approach, Prentice Hall, NJ, 1995
- Patterson, Dan W. Introduction to Artificial Intelligence and Expert Systems, Prentice Hall of India Private Limited New Delhi, 1998.
Lesson
Structured Knowledge Representation
Subject
Computer Engineering
Grade
Engineering
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