Retrieval
Basic Approaches
Retrieval
l Full text Indexing and Retrieval
Indexing unstructured resource contents
Many COTS solutions, active growth in features
Limitations in relevance, information overload
l Browsing
Manual Classification
Keyword to structured taxonomy
Manual tags by intermediaries or automated tagging
Can be combined with full text retrieval to sharpen,
e.g. augment browse with search for browse append
Machine-Assisted Indexing and Classification
Applies algorithms to content
Match meaning to keywords or taxonomy