Keyphrases
- xml documents
- semantic information
- xml data
- xml fragments
- xml queries
- xml schema
- xml databases
- structured data
- integrity constraints
- logic programming
- multi dimensional
- keyword search
- data model
- formal semantics
- relational schema
- document centric
- document type definitions
- xml information retrieval
- document type
- database
- relational tables
- content and structure
- labeling scheme
- relational databases
- search engine