原文地址：http://www.w3schools.com/xhtml/xhtml_modules.asp
翻译：范维肖
Why XHTML Modularization?
为什么要模块化设计XHTML呢?
XHTML is a simple but large language, containing most of the functionality a web developer will need.
XHTML虽然简单，但是它的内容很多，包括了一个网络设计师需要的绝大多数功能。
For some purposes XHTML is too large and complex, and for other purposes it is much too simple.
XHTML一方面内容繁多复杂，但是从另一个角度来看它却是非常简单的
By splitting XHTML into modules, the W3C (World Wide web Consortium) has created small and well-defined sets of XHTML elements that can be used separately for simple devices as well as combined with other XML standards into larger and more complex applications.
为了将XHTML分割成小的模块，W3C已经建立起了小型大已经定义好了的一系列XHTML元素，他们独立的能被与其他XML标准合并成的大型的更复杂的程序的简单设备所使用。
With modular XHTML, product and application designers can:
通过XHTML模型，程序设计师能够做下面的事情：
1.Choose the elements to be supported by a device using standard XHTML building blocks.
2.Add extensions to XHTML, using XML, without breaking the XHTML standard.
3.Simplify XHTML for devices like hand held computers, mobile phones, TV, and home appliances.
4.Extend XHTML for complex applications by adding new XML functionality (like MathML, SVG, Voice and Multimedia).
5.Define XHTML profiles like XHTML Basic (a subset of XHTML for mobile devices).
1。选择那些能够被使用XHTML构建块标准的设备所支持的元素。
2。在遵循XHTML标准的同时使用XML可以对XHTML扩展。
3。简单化的XHTML可以应用于像掌上电脑、移动电话、电视和家用电器的设备。
4。通过加入心的XML功能（像声音、多媒体的）将XHTML延续到复杂程序的设计上。
5。像XHTML基本（XHTML对于移动设备的一个子集）那样来定义XHTML的轮廓。
XHTML Modules
Module name
Description
Applet Module
Defines the deprecated* applet element.
Base Module
Defines the base element.
Basic Forms Module
Defines the basic forms elements.
Basic Tables Module
Defines the basic table elements.
Bi-directional Text Module
Defines the bdo element.
Client Image Map Module
Defines browser side image map elements.
Edit Module
Defines the editing elements del and ins.
Forms Module
Defines all elements used in forms.
Frames Module
Defines the frameset elements.
Hypertext Module
Defines the a element.
Iframe Module
Defines the iframe element.
Image Module
Defines the img element.
Intrinsic Events Module
Defines event attributes like onblur and onchange.
Legacy Module
Defines deprecated* elements and attributes.
Link Module
Defines the link element.
List Module
Defines the list elements ol, li, ul, dd, dt, and dl.
Metainformation Module
Defines the meta element.
Name Identification Module
Defines the deprecated* name attribute.
Object Module
Defines the object and param elements.
Presentation Module
Defines presentation elements like b and i.
Scripting Module
Defines the script and noscript elements.
Server Image Map Module
Defines server side image map elements.
Structure Module
Defines the elements html, head, title and body.
Style Attribute Module
Defines the style attribute.
Style Sheet Module
Defines the style element.
Tables Module
Defines the elements used in tables.
Target Module
Defines the target attribute.
Text Module
Defines text container elements like p and h1.
* Deprecated elements should not be used in XHTML.