The core of the model is graphical query language, this paper has a brief presentation for the Data Model and the query language.

该模型的核心是一种图形查询式语言，它既具有电子教材的功能，又避免了某些缺点。

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New query language support (for XQuery), a new graphical query builder (for XQuery), and new query optimization techniques.

新查询语言支持(针对Xquery)、新图形查询构建程序(针对Xquery)和新查询优化技术。

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