Patent US 6,904,429

Character data of a word or phrase in a document is designated. Desired data is retrieved from a predetermined database on the basis of the designated character data. One sentence including at least the designated character data is cut out and subjected to sentence analysis. On the basis of a sentence analysis result, specific data is selected from the retrieval result acquired from the database. In addition, character data of a word or phrase in a document is designated. One sentence including at least the designated character data is cut out and subjected to sentence analysis to extract a keyword. A retrieval condition is prepared on the basis of the extracted keyword, and desired data is retrieved from a predetermined database on the basis of the retrieved conditional expression.