Keyphrases
- fixpoint
- modal logic
- proof theoretic
- nonmonotonic logics
- logic programs
- truth values
- nonmonotonic reasoning
- deductive databases
- inference rules
- horn clauses
- finite state machines
- decision procedures
- temporal logic
- default logic
- model theoretic
- stable models
- fixpoint semantics
- logic programming
- expressive power
- background knowledge
- modal operators
- sql queries
- update rule
- answer sets
- datalog programs
- integrity constraints
- natural language
- sequent calculus
- database systems
- databases