Information Retrieval - http://en.wikipedia.org/wiki/Information_retrieval
Semantic Search - http://en.wikipedia.org/wiki/Semantic_search
Formal Concept Analysis (FCA) - http://en.wikipedia.org/wiki/Formal_concept_analysis
Zipf's Law - http://en.wikipedia.org/wiki/Zipf%27s_law
FCA Homepage by Uta Priss - http://www.upriss.org.uk/fca/fca.html
In-Close2 : An Algorithm to Compute Formal Concepts (2009) - http://mirror.transact.net.au/sourceforge/i/project/in/inclose/In-Close2/
Concept Explorer (ConExp) : A Free Software for Lattice Visualization - http://conexp.sourceforge.net/
Semantic Search - http://en.wikipedia.org/wiki/Semantic_search
Formal Concept Analysis (FCA) - http://en.wikipedia.org/wiki/Formal_concept_analysis
Zipf's Law - http://en.wikipedia.org/wiki/Zipf%27s_law
FCA Homepage by Uta Priss - http://www.upriss.org.uk/fca/fca.html
In-Close2 : An Algorithm to Compute Formal Concepts (2009) - http://mirror.transact.net.au/sourceforge/i/project/in/inclose/In-Close2/
Concept Explorer (ConExp) : A Free Software for Lattice Visualization - http://conexp.sourceforge.net/