Keyphrases
- logic programs
- xml documents
- logic programming
- answer sets
- answer set programming
- fixpoint
- xml data
- stable models
- normal logic programs
- prolog programs
- background knowledge
- xml schema
- relational data
- data model
- integrity constraints
- semantic information
- relational databases
- logic program updates
- strong equivalence
- sql queries
- inductive logic programming
- partial deduction
- horn clauses
- computational properties
- loop formulas
- databases
- expressive power
- natural language
- semantics of logic programs
- term rewriting systems