The specialized topicref element lets authors specify semantics or constraints on collections of topics.

专门化的topicref元素允许作者规定主题集合的语义或者约束。

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For complete, single-purpose collections such as functional specifications, information plans, and quick reference guides, you might package these specialized topicref elements with a new map type.

对于完整的、用途单一的集合，如功能规范、信息规划和快速参考指南，您可以将这类专门化的topicref元素打包成新的映射类型。

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For complete, single-purpose collections such as functional specifications, information plans, and quick reference guides, you might package these specialized topicref elements with a new map type.

对于完整的、用途单一的集合，如功能规范、信息规划和快速参考指南，您可以将这类专门化的topicref元素打包成新的映射类型。

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