Boots – shoes – and leggings
Patent
1993-11-17
1996-07-09
Black, Thomas G.
Boots, shoes, and leggings
3642254, 3642746, 3642821, 364963, 3649631, 364974, 3649746, 364DIG1, 364DIG2, 36441919, 395900, 395934, G06F 1730, G06F 1518
Patent
active
055353827
ABSTRACT:
A document retrieval system retrieves one or a plurality of registered documents from a document database responsive to retrieval conditions designated by a user. The document retrieval system includes a query converter for converting the retrieval condition designated by the user into a query which has a predetermined normal form in which keywords and at least one type of logical operation out of logical operations AND, OR and NOT are connected, a bibliographical information indicator for indicating a relation between each of said registered documents and keywords and a keyword connection table having relationship values, each of the relationship values representing the degree of relationship between each two keywords. The document retrieval system also includes a selector for referring the inverted file and the keyword connection so as to select one or a plurality of registered documents which satisfy the query, and an outputting circuit for outputting one or a plurality of registered documents selected by the selecting means.
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Black Thomas G.
Choules Jack M.
Ricoh & Company, Ltd.
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