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A Free-text Database Retrieval System Incorporating The Semantic Network Wordnet

Award Information

Department of Defense
Defense Advanced Research Projects Agency
Award ID:
Program Year/Program:
1993 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Netrologic, Inc.
5080 Shorehame Pl, STE 201 San Diego, CA 92122
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 1993
Title: A Free-text Database Retrieval System Incorporating The Semantic Network Wordnet
Agency / Branch: DOD / DARPA
Contract: N/A
Award Amount: $49,990.00


Searches of free text databases depend on the keywords used in the request for information. If keywords are extracted from the user's query and no use is made of synonyms, relevant data in the database may be overlooked. The same can be the case if class-subclass, and part-whole information is ignored. The semantic network WordNet that has been developed a Princeton University encodes a very rich store of semantic information concerning relationships between words that are used constantly in any language understanding. These include subordinate-superordinate and part-whole information, as well as refinements to them, restrictions of relationships to appropriate contexts and mappings between words of different categories (nouns, adjectives, verbs). It is envisioned that uses of the relationships encoded in WordNet can allow the computer to make deductions allowing it to determine that many texts are relevant to the needs that a user expressed in quite different terms. Netrologic proposes to develop a system to categorize articles based on concepts encoded in WordNet, and to create a free text database interface to search documents categorized in this way. ANTICIPATED BENEFITS: The efficient determination of all documents in a database relevant to a user's needs is becoming increasingly important, as larger and larger free text databases are coming in line. A system that contains an embedded semantic network can be an invaluable aid to everyone in both government and the general public who will be making extensive uses of large databases.

Principal Investigator:

Sue Toledo

Business Contact:

Small Business Information at Submission:

Netrologic, Inc.
5080 Shoreham Place, Suite 201 San Diego, CA 92122

Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No