Keyphrases
- xml documents
- xml data
- xml queries
- relational databases
- xml databases
- structured data
- xml schema
- relational data
- xml information retrieval
- integrity constraints
- keyword search
- semantic information
- data model
- xpath queries
- labeling scheme
- structured documents
- semi structured data
- document structure
- content and structure
- semi structured
- information retrieval
- sql queries
- database systems
- path expressions
- xml query processing
- case study