Important Phases
I. Text parsing or Document analysis
II. Data structure assembly
III. Data encodings (terms, documents, concepts)
IV. Query matching and document retrieval
V. Updating (and downdating)
D.I. Witter and M.W. Berry, Downdating the Latent Semantic Indexing Model for Conceptual Information Retrieval, The Computer Journal 41:8 (1998), pp. 590-601.