Keyphrases
- xml documents
- xml data
- open access
- metadata
- markup language
- xml databases
- xml queries
- data exchange
- xml schema
- data mining
- scientific disciplines
- xml format
- topic maps
- data integration
- scientific data
- databases
- data transformation
- labeling scheme
- extensible markup language
- scientific knowledge
- relational data
- semi structured
- science education
- semi structured data
- structured data
- path expressions
- science learning
- database objects
- data types
- scientific discovery
- object oriented
- database systems
- object oriented databases
- keyword search