Keyphrases
- xml documents
- xml data
- data model
- xml queries
- relational data
- relational databases
- abstract machine
- logic programming
- programming language
- integrity constraints
- expert systems
- structured data
- xml databases
- xml information retrieval
- knowledge representation
- prolog programs
- semi structured data
- document structure
- knowledge base
- xpath queries
- sql queries
- logic programming language
- labeling scheme
- path expressions
- keyword search
- constraint logic programming
- retrieval model
- database management systems
- programming paradigms
- databases