KNOWLEDGE
Knowledge is the collection of facts, inference rules etc. which can be
used for a particular purpose. Knowledge requires the use of data and
information. It combines relationships, correlations, dependencies with data and
information.
The basic components of knowledge are:
1)
A set of collected data
2)
A form of belief or hypothesis
3)
A kind of information.
Knowledge is different from data. Data is the collection of raw
materials where as knowledge is the collection of some well specified inference
rules and facts. Knowledge is also different from belief and hypothesis. Belief
is any meaningful and coherent expression that can be represented. Belief may
be true or false. A hypothesis is a justified belief that is not known to be
true. A hypothesis is a belief which is backed up with some supporting evidence
but it may still be false. So knowledge can be defined as true justified
knowledge.
KNOWLEDGE BASED SYSTEMS
Knowledge based systems get their power from the expert knowledge that
has been coded into facts, rules, heuristics and procedures. The knowledge is
stored in a knowledge base separate from the control and inferencing
components. Knowledge is important and essential for knowledge based
intelligent behaviour.
Figure A typical Knowledge based
system
Any choice of representation will depend on the type of problem to be
solved and the inference methods available. Knowledge may be vague,
contradictory or incomplete. Thus, knowledge is information about objects,
concepts and relationships that are assumed to exist in a particular area of
interest.
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