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Method for ranking documents in a hyperlinked environment using connectivity and selective content analysis

Patent 6112203 Issued on August 29, 2000. Estimated Expiration Date: Icon_subject April 9, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

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Inventors

Application

No. 058577 filed on 04/09/1998

US Classes:

707/5, Query augmenting and refining (e.g., inexact access)707/3, Query processing (i.e., searching)707/102, Generating database or data structure (e.g., via user interface)715/513, Structured document (e.g., HTML, SGML, ODA, CDA)715/514Hierarchical control

Examiners

Primary: Homere, Jean R.

Attorney, Agent or Firm

International Class

G06F 017/21

Abstract

In a computerized method, a set of documents is ranked according to their content and their connectivity by using topic distillation. The documents include links that connect the documents to each other, either directly, or indirectly. A graph is constructed in a memory of a computer system. In the graph, nodes represent the documents, and directed edges represent the links. Based on the number of links connecting the various nodes, a subset of documents is selected to form a topic. A second subset of the documents is chosen based on the number of directed edges connecting the nodes. Nodes in the second subset are compared with the topic to determine similarity to the topic, and a relevance weight is correspondingly assigned to each node. Nodes in the second subset having a relevance weight less than a predetermined threshold are pruned from the graph. The documents represented by the remaining nodes in the graph are ranked by connectivity based ranking scheme.

Other References

  • Kleinberg, "Authoritative Sources in a Hyperlinked Environment," Proc. of ACM-SIAM Symposium on Discrete Algorithms, 1998 (to appear). Also appears as IBM Research Report RJ 10076, May 1997
  • Frakes et al., "Information Retrieval, Data Structures and Alrithms," Prentic Hall, Englewood Cliffs, New Jersey 0763
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