This invention provides methods and apparatus for context based querying to more efficiently provide directory services. In particular, methods and apparatus for querying a database to resolve contact information, e.g., a phone number, based on the context of the query are provided. By querying based...http://www.google.com.tw/patents/US6976017?utm_source=gb-gplus-share專利 US6976017 - Method and apparatus for context based querying
