对于文档方面，我们可以从结构化文本开始接近微格式。

For the document approach we can come at microformats from the structured text side.

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关键词特性描述非结构化文本内容中出现的单词和短语。

The keyword features describe the occurrences of words and phrases in the unstructured text content.

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该文介绍了一个应用于结构化文本的检索系统的设计和实现。

The design and implementation of Structured Text Retrieval System is introduced in this paper.

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