Keyphrases
- xml documents
- xml data
- xml format
- learning resources
- xml schema
- markup language
- relational databases
- learning experience
- xml queries
- xml databases
- learning materials
- e learning
- learning environment
- databases
- metadata
- learning activities
- learning systems
- learning process
- learning styles
- data types
- collaborative learning
- sparse representation
- semi structured
- language learning
- relational data
- xpath queries
- learning outcomes
- electronic documents
- data integration
- document management
- database
- data transformation
- concept mapping
- social learning
- extensible markup language
- learning content
- object oriented databases
- data model
- database systems
- foreign language
- learning community
- topic maps
- twig queries
- keyword search
- information retrieval systems