对于类型和布局有些设计者仍然想要100%的控制，他们希望自由使用图片、Flash和其他加载很慢的元素来实现这一点。
Some designers still want 100% control over type and layout, and they want the freedom to use images, Flash and other slow-loading elements to achieve it.
现有主题的可扩展内容：文档设计者可以使用内容的新类型重用主题现有的类型。
Extensible content for existing topics: The document designer can reuse existing types of topics with new types of content.
更简单的主题层次结构：文档设计者可以添加内容的新类型，而无需添加主题的新类型。
Simpler topic hierarchies: The document designer can add new types of content without having to add new types of topics.
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