| 摘要 |
<p>A method and system for accessing information or data from distributed databases. The system includes a computer (16) adapted to present the user a query input screen displayable on screen (18), an extractor (22) to extract important nouns or key nouns and noun phrases in a user's query, a stemmer (24) to return the base word in each query term, a synonym generator (26) which identifies synonyms for each query term. The method includes the steps of processing a query to generalize and expand the query to return as many relevant terms to the user, receiving from the user selected terms which the user expects to find in attributes of the distributed databases and searching the directories of the distributed databases using a Lightweight Directory Access Protocol (LDAP) (30). A query executor or mediator (32) retrieves data from the specified databases in accordance with SQL code.</p> |
