Write an example of an element. Write an example of tree-structured, tagged data. Write an example of an attribute. Write an example of an entity. Write an example of an XML comment. Write an example of CDATA. Write an example of a processing instruction. What are the six rules of well-formedness? Write an example of a namespace. What is a DTD? What is a schema? By the way, this page is written in... XML! How would you go about seeing the raw XML data?