Patent ID: 6338034
Filing Date: 2002-01-08
Classification: G06F

Abstract:
A method of preparing a document summary which comprises the steps of:extracting sentence-constituting-elements from the document; classifying said sentence-constituting-elements into categories; extracting commonly-held-information which is common to said sentence-constituting-elements in the same; looking up common expression information which is common to plural pieces of said commonly-held-information in a thesaurus in which said commonly-held-information and said common expression information are connected by a hierarchical tree; and composing the document summary based on said commonly-held-information and said common expression information; wherein said categories include â€œWhenâ€ , â€œWhereâ€ , â€œWhoâ€ , â€œWhatâ€ , â€œWhyâ€ , â€œHowâ€  and â€œDoneâ€ .