Patent ID: 7275061

Claim:
A method for topical indexing a document collection that is initially unconnected with a 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 to derive keywords for each topic, 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; forming first keyword-weight pairs of said associated keywords; applying the associated keywords to at least one document from said initially unconnected document collection and forming second keyword-weight pairs associated with said at least one document; forming a numeric score between the first and second keyword-weight pairs; and based on said score, associating said at least one document from said initially unconnected document collection and said single topic from said plurality of topics.