Patent ID: 7720799

Claim:
A method for extending a body of textual reference material to generate a directory for accessing documents from a document collection that is initially unconnected with said body of textual reference material, comprising processing the body of textual reference material into a plurality of text portions, each text portion being associated with a single topic from a plurality of topics, processing said plurality of text portions, generating keywords for each, assigning a weight to each keyword in a text portion, associating a keyword with a corresponding text portion if the weight of said keyword in said corresponding text portion is equal to or greater than a weight of said keyword in the text portions other than the corresponding text portion, or is equal to or greater than a predetermined threshold value, and forming first keyword-weight pairs of said associated keywords, and applying the associated keywords to at least one document from the initially unconnected document collection, and forming second keyword-weight pairs associated with the at least one document, forming a numeric score between the first and second keyword-weight pairs, and associating based on said score the at least one document from the initially unconnected document collection and the single topic from the plurality of topics.