Keyphrases
- logic programs
- web search
- logic programming
- stable models
- answer sets
- answer set programming
- search engine
- fixpoint
- prolog programs
- background knowledge
- partial deduction
- inductive logic programming
- normal logic programs
- web pages
- computational properties
- stable model semantics
- strong equivalence
- semantics of logic programs
- logic program updates
- artificial intelligence
- existentially quantified
- knowledge base
- monotonicity constraints