6.9. Summary

This chapter covered some of the basics of XML, including the differences between elements and attributes. It also delved into what makes an XML document well formed and not well formed. In addition, I covered how to make script elements in XHTML from both an XML and JavaScript point of view, as well as entities.

The subject of namespaces was covered along with their purpose. This included a brief look at both Document Type Definitions and schemas, and the role that they play in validation. Finally, this chapter covered the role that XML Data Islands can play within an HTML document.