Keyphrases
- unsupervised learning
- semantic mappings
- semantic mapping
- peer to peer
- ontology mapping
- metadata
- supervised learning
- semi supervised
- semantic heterogeneity
- multiple data sources
- data sources
- dimensionality reduction
- expectation maximization
- domain ontology
- document retrieval
- machine learning
- semi automatic
- domain knowledge
- databases
- database
- data access
- text classification
- ontology matching
- structural constraints
- training set