Parsing and executing those commands can be tricky, however.

然而，解析和执行这些命令可能会非常棘手。

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The access control module of DSPS enforces tuple level MAC through Integrity lock and enforce attribute level MAC through SQL commands parsing and controlling.

访问控制模块利用完整性锁结构实现元组级强制访问控制，利用SQL语句分析实现属性级强制访问控制。

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