Keyphrases
Canonical Form
8%
Complete Specification
8%
Complete Tree
8%
Containment
100%
Containment Problem
16%
Database Management Systems
8%
Exponential number
8%
Generalized Tree
100%
Heuristic Approach
100%
High Complexity
8%
Homomorphism
16%
Keyword Query
8%
Large Fragment
8%
Partial Specification
25%
Partial Tree
58%
Processing Techniques
8%
Query Containment
8%
Query Language
16%
Query Optimizer
8%
Query Processing
8%
Structural Expression
16%
Tree number
8%
Tree Pattern Queries
100%
Tree Patterns
16%
XML Data
25%
XPath
8%
Computer Science
Canonical Form
33%
Checking Containment
100%
Data Source
66%
Database Management System
33%
Exponential Number
33%
Partial Specification
100%
Query Containment
33%
Query Language
66%
Query Optimizer
33%
Query Processing
33%
Sufficient Condition
33%