Patent Document ID: 9720979
Application ID: 14504420

Base Claim:
1. A method of information retrieval comprising: obtaining a content of a content block; representing the content as a content vector; receiving a query; representing the query as a query vector; determining a hierarchical sliding similarity and dissimilarity for matching the content vector and the query vector, and wherein determining a hierarchical sliding similarity for matching the content vector and the query vector: determining a similarity measure and a dissimilarity measure for each content vector element with respect to the query vector, wherein each content vector element is provided a unique sub-similarity similarity measure and a unique sub-dissimilarity measure; for each unique sub-similarity similarity measure and each unique sub-dissimilarity measure of each content vector element, identifying a strong match over a sliding window of sub-terms of each content vector element, wherein the strong match comprises a strong similarity match and a strong dissimilarity match; computing a sub-similarity score and a sub-dissimilarity score for each level of the convent vector element; determining a final similarity score as a combination of the strong match of some sub-vectors at different levels; and determining a final dissimilarity score as a combination of the strong match of some sub-vectors at different levels.

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Claim 8:
8. The method of claim 1 , wherein the dissimilarity measure is computed as a compliment of a partial similarity between the query vector and the content vector and using a weighted contextual information derived from the query.