Keyphrases
- markup language
- xml documents
- data interchange
- xml data
- xml schema
- data model
- xml format
- data transformation
- relational data
- metadata
- xml queries
- extensible markup language
- databases
- xml processing
- html documents
- xml databases
- semi structured data
- database
- stored in relational databases
- relational database systems
- topic maps
- keyword search
- linked data
- semantic web
- query language
- semi structured
- xml query languages
- query optimization
- database management systems
- general purpose