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Define Latent Semantic Indexing (LSI)

latent semantic indexing (LSI). Latent semantic indexing (LSI) is an indexing and retrieval method that uses a mathematical technique called singular value decomposition (SVD) to identify patterns in the relationships between the terms and concepts contained in an unstructured collection of text. (Source: Wikipedia)

If you found that hard to follow, join the club. Suffice it to sat that it is an algorithmic technique used by Google (or maybe not, there is some controversy) to determine what a web page is all about.

 


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