Original Address: http: //www.w3schools.com/xhtml/xhtml_modules.asp translation: Fanwei Xiao Why XHTML Modularization Why do modular design XHTML XHTML is a simple but large language, containing most of the functionality a web developer will?? Need.xhtml is simple, but its content, including a network designer needs most of the features needed. For some purpos xhtml is to large and complex, and for other purposes it is much thing is a wide complicated on the one hand, but it is very simple from another angle. It is very simple 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. in order to XHTML into smaller modules, W3C has been established A series of XHTML elements that have already been defined, and their independently can be used by simple and more complex programs that merge with other XML standards. With modular XHTML, product and application designers can: by XHTML model, programmers can do the following things:. 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. Elements that are supported by devices that can be used to build blocks using XHTML. 2. Using XML can be extended using XML while following XHTML standards. 3. Simplified XHTML can be applied to devices like handheld, mobile phones, television and household appliances. 4. The XHTML continues to complex programs by adding XML function (like sound, multimedia). 5. The outline of XHTML is defined like XHTML basics (XHTML for a subset of mobile devices). XHTML Modules