简单性：程序可以使用这些节点测试，选择基于共同组head元素或类型定义的一组元素，而不是逐一列举所有具体的元素名。
Simplicity: the program can use these node tests to select a group of elements based on their common group head element or type definition rather than enumerate all concrete element names one by one.
问答系统的研究试图使系统能回答较宽范围的问题，包括：事实、列举、定义、方式、原因、假设、语义约束和跨语言类型的问题。
QA research attempts to deal with a wide range of question types including: factoid, list, definition, how, why, hypothetical, semantically-constrained, and cross-lingual questions.
虽然有不同类型的企业博客，但主要分为外部企业博客和内部企业博客。还有很多对企业博客的定义，这里不一一列举。
Although there are many different types of corporate blogs, they are mostly categorized as either external or internal corporate blogs.
这个列举型别允许开发人员借由定义为不同的专案类型的CATID延伸只有一种专案类型。
This enumeration allows developers to extend only one type of project by defining CATIDs for different project types.
这个列举型别允许开发人员借由定义为不同的专案类型的CATID延伸只有一种专案类型。
This enumeration allows developers to extend only one type of project by defining CATIDs for different project types.
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