Document Comparison Using Multiple Similarity Measures

Abstract

Disclosed herein is a method for comparing documents. The method includes the steps of: determining a plurality of similarity measures; and determining an overall similarity measure for the plurality of documents, based on the plurality of similarity measures. In one embodiment, the similarity measures are chosen from the group of similarity measures consisting of semantic and reference similarity measures. When comparing documents from the chemical, biochemical or pharmaceutical domains, the determination of the similarity utilizes a determination of structural similarity of the chemical formulas described in the plurality of documents.

1 . A knowledge retrieval system, comprising:
 a parser for extracting required information from presented materials;   an annotator for annotating terms from said parsed presented materials by utilizing at least one of an ontology, a taxonomy, and a dictionary;   a chemical representation device for deriving information about said annotated terms, based on a connection table;   an integrator for collating said derived information for storage in a database; and   a retrieval system for retrieving information from said database, based on input search criteria.   
   
   
       2 . The system of  claim 1 , further comprising:
 a crawler for obtaining said presented materials from the Internet.   
   
   
       3 . The system of  claim 1 , wherein said required information is selected from inventors' names, assignees, titles, and abstracts. 
   
   
       4 . The system of  claim 1 , wherein said annotated terms are scientific terms identified and classified from said parsed presented materials. 
   
   
       5 . The system of  claim 1 , wherein said annotator further creates a reference graph based on references contained within said parsed presented materials. 
   
   
       6 . The system of  claim 1 , wherein said presented materials are patent documents. 
   
   
       7 . A knowledge retrieval system, comprising:
 a parser for extracting required information from presented materials;   an annotator for annotating terms from said parsed presented materials by utilizing at least one of an ontology, a taxonomy, and a dictionary;   a chemical representation device for deriving information about said annotated terms, based on a connection table;   an integrator for collating said derived information for storage in a database; and   a retrieval system for retrieving information from said database, based on input search criteria, and   wherein said annotated terms are scientific terms identified and classified from said parsed presented materials.   
   
   
       8 . The system of  claim 7 , further comprising:
 a crawler for obtaining said presented materials from the Internet.   
   
   
       9 . The system of  claim 7 , wherein said required information is selected from inventors' names, assignees, titles, and abstracts. 
   
   
       10 . The system of  claim 7 , wherein said annotator further creates a reference graph based on references contained within said parsed presented materials. 
   
   
       11 . The system of  claim 7 , wherein said presented materials are patent documents. 
   
   
       12 . A knowledge retrieval system, comprising:
 a parser for extracting required information from presented materials;   an annotator for annotating terms from said parsed presented materials by utilizing at least one of an ontology, a taxonomy, and a dictionary;   a chemical representation device for deriving information about said annotated terms, based on a connection table;   an integrator for collating said derived information for storage in a database; and   a retrieval system for retrieving information from said database, based on input search criteria, and   wherein said annotator further creates a reference graph based on references contained within said parsed presented materials.   
   
   
       13 . The system of  claim 12 , further comprising:
 a crawler for obtaining said presented materials from the Internet.   
   
   
       14 . The system of  claim 12 , wherein said required information is selected from inventors' names, assignees, titles, and abstracts. 
   
   
       15 . The system of  claim 12 , wherein said annotated terms are scientific terms identified and classified from said parsed presented materials. 
   
   
       16 . The system of  claim 12 , wherein said presented materials are patent documents.