what is a vivid knowledge base

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what is a vivid knowledge base

I read in an exam about knowledge representation the question:

What is a vivid knowledge base?

And I wonder about the answer. Google only gives me some links to books which I can buy about it or some CiteSeerX articles. Wikipedia also doesn't know anything about it.

Is there any good online article?

Is "vivid knowledge" a common term or is another term more common?

+2 A:

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Developer Art 2009-11-13 15:41:43

Yes that is what I meant by the book links. But is there a more complete article? This is only the first page and you cannot access the other page.

Albert 2009-11-13 16:55:34

Also, I don't exactly understand the content. What exactly is a disjunctive knowledge base? What is vivid reasoning? And a relational database is not a knowledge base - the whole point of KR is to have a base of knowledge which usually gives you an infinite amount of facts you can conclude from it - that is the difference to a database.

Albert 2009-11-13 18:10:55

This article explains it a bit better: Vivid Knowledge and Tractable Reasoning: Preliminary Report

As far as I understand it, a vivid knowledge base is a knowledge base with a closed world assumption.

Please correct me if I am wrong.

Albert 2009-11-13 18:00:37

Another definition:

a first-order KB is vivid :<=>

for some finite set of positive function-free ground literals KB+ :

KB = KB+ ∪ 'Negations' ∪ 'Domain closure' ∪ 'Unique names'

And another one:

a KB is vivid :<=>

KB is a complete and consistent set of literals (for some language)

To specify complete:

a KB is complete :<=> there is no formular α such that KB ⊭ α and KB ⊭ ¬α

To specify consistent:

a KB is not consistent :<=> its negation is a tautology

Albert 2009-11-21 12:00:23

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