通过建立一个受限词汇的综合信息库，记录词汇的各种语法、语义信息；
The paper builds a dictionary that includes the restricted words' grammatical and semantic attributes.
当w3c词汇表同时指定了元素和属性时，通常只要属性出现在受限的元素中，它就不需要将它们限定于名称空间。
When a W3C vocabulary specifies both elements and attributes, it typically will not require that the attributes be qualified to the namespace as long as they occur on elements that are qualified.
对于时间的讨论往往受限于缺少合适的词汇。
Discussions of time are limited by our lack of a suitable vocabulary.
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