What are the basic constructs of an XML document?

In a DTD, how does one say that an attribute must exist in the XML document?

How does XPath view a XML document?

Which is well-formed?

How do you reference '>' in an XML document without using it as an XML character? (e.g., how do you escape '>' in XML?)

Which is a positive reason to use a schema?

You are working with an XML document that uses an XML schema. How do you specify that an element can appear multiple times inside its parent element?

How does the XML DOM present an XML document?

In an XML DTD ATTLIST declaration, which default value is used to indicate that the attribute does not have to be included?

What is the last step in extending XHTML modules?

XML provides a framework for specifying markup languages, while HTML is a predefined markup language. What is applicable to XML and not HTML?