| 摘要 |
A database system includes a query controller and an XML database, and is connected to other terminal devices such as a user device via a network. In such a configuration, when a query request is transmitted from the user device to the XML database, the query controller determines whether an access to a node corresponding to the query request by a user specified by user information is permitted or denied by referring to access information relative to each node stored in an access control DB, to extract an access-permitted query request, and transfers only the extracted query request to the XML database.
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