1. XHTML,XML M.Abdullah Mrian

2. What is the XHTML

3. Why XHTML ?

12. What is XML?  XML stands for EXtensible Markup Language.  XML is a markup language much like HTML.  XML was designed to describe data.  XML tags are not predefined. You must define your own tags  XML uses a Document Type Definition (DTD) or an XML Schema to describe the data.  XML with a DTD or XML Schema is designed to be self- descriptive.

13. The main difference between XML and HTML  XML was designed to carry data.  XML is not a replacement for HTML.  XML and HTML were designed with different goals:  XML was designed to describe data and to focus on what data is.  HTML was designed to display data and to focus on how data looks.  HTML is about displaying information, while XML is about describing information.

14. XML does not DO anything  XML was not designed to DO anything. Maybe it is a little hard to understand, but XML does not DO anything.  XML was created to structure, store and to send information. The following example is a note to Tove from Jani, stored as XML:

15. What is XSL?  XSL stands for eXtensible Stylesheet Language.  CSS was designed for styling HTML pages, and can be used to style XML pages.  XSL was designed specifically to style XML pages, and is much more sophisticated than CSS. XSL consists of three languages:  XSLT (XSL Transformations) is a language used to transform XML documents into other kinds of documents (most commonly HTML, so they can be displayed).  XPath is a language to select parts of an XML document to transform with XSLT.  XSL-FO (XSL Formatting Objects) is a replacement for CSS.