Keyphrases
- integrity constraints
- logic programming
- logic programs
- deductive databases
- nonmonotonic reasoning
- answer set programming
- knowledge representation
- programming language
- query answering
- database schema
- answer sets
- logic programming language
- knowledge base
- functional dependencies
- xml documents
- default logic
- reasoning tasks
- knowledge representation and reasoning
- artificial intelligence
- conjunctive queries
- stable models
- constraint logic programming
- fixpoint
- database
- null values
- predicate logic
- probabilistic reasoning
- relational databases
- databases