What is LSI - Therefore, LSI introduces...
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Therefore, LSI introduces interdependence of measure and it rates the relevance of any document on a scale of 0 to 1. Unlike regular keyword searches, LSI can acknowledge the measure of how close is a document to another or how relevant is a credential to a particular context.
Let's consider an example here. In a document that discusses Stephen Covey and his preaching, words such as 'effective', 'habits', 'interdependence', 'independence', 'synergic', 'paradigm', 'continuum', 'public victory', 'private victory', 'circle of influence' and so on would be found frequently. Once the search engine indexing tool that uses the LSI technique recognizes these commonly-used words from a given set of documents, it can find other documents or Web pages on the net that contains the same set of keywords in almost similar frequency and index them in the database beside the relevant context (Stephen Covey and his preaching) that it leads to.
Now compare this simple method with a human brain's approach to search a context. If you are given a set of document and asked to locate the one's that discuss a particular context, what will you do? Anyone will try to find out the things in common in the sample context and use the observation to compare the rest of the documents to classify them. This intelligence has been added to the lifeless crawler-software or computer technology through the LSI technology.
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