| 摘要 |
Techniques are disclosed for improved information integration in accordance with information sources such as web services in a distributed information system. For example, a technique for processing a query obtained from a user in an information integration system, wherein the information integration system is associated with a database and one or more information sources, comprises the following steps/operations. The user query is transformed to one or more queries valid with respect to one or more of the information sources associated with the database. Based on the one or more transformed queries, a query plan executable on the database is generated, wherein at least a portion of results returned to the user in response to the query are based on at least a portion of results returned from execution of the query plan. In one embodiment, the information sources may be web services. Further, a number, a nature and/or an identity of the one or more information sources may be dynamic or change over time.
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