Keyphrases
- metadata
- topic maps
- xml documents
- xml data
- xml queries
- markup language
- heterogeneous data sources
- relational databases
- data repositories
- xml format
- xml schema
- xml databases
- semistructured data
- learning objects
- object oriented
- data model
- databases
- semi structured
- xml technology
- relational data
- content and structure
- object oriented databases
- data exchange
- relational database systems
- data integration
- source code
- xml retrieval
- digital libraries
- update operations
- metadata schemas
- labeling scheme
- keyword search
- data types
- building blocks
- information retrieval systems
- neural network