The DITA topic map plays the role of a use case model.

DITA主题图扮演用例模型的角色。

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The research of access control model is a topic of information security area.

访问控制模型是信息安全领域研究的重点之一。

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For text-mining method of event topic, the method of event model was also proposed.

针对文本中事件专题挖掘，提出事件模型学习算法。

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For text-mining method of event topic, the method of event model was also proposed.

针对文本中事件专题挖掘，提出事件模型学习算法。

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