The pages are not unique, since parts of them are updated in the background. That implies obvious problems for the SE bots. Yous should be aware of this since more and more companies use AJAX technologies on their web pages. XML is an important element in the AJAX technology and there are a lot of technologies that empovers XML. Some of them are:
- The document object model (DOM).
- Document Type Definition (DTD).
- Recommended DTDs to use in your Web document.
- XML Path Language (XPath)
- XML Linking Language (XLink)
- XML Pointer Language (XPointer)
CSS is also an important element in the technology, even if it is not needed. A lot use PHP as server language and MySQL as database platform, but any server language and SQL database plattform may be used to create AJAX functionality.