On deciding well-definedness for query languages on trees.
Stijn VansummerenPublished in: J. ACM (2007)
Keyphrases
- query language
- data model
- expressive power
- decision trees
- object oriented
- database
- relational algebra
- recursive queries
- query evaluation
- tree models
- transitive closure
- tree structure
- tree nodes
- regular expressions
- conjunctive queries
- neural network
- relational model
- query optimization
- xml data
- data sources
- tree structures
- constraint databases
- tree automata
- relational calculus
- data structure
- machine learning