Summary

In this chapter you learned that:

• DTD stands for the Document Type Definition.

• DTD can be used to model an XML document using non-XML command structures.

• DTD allows for definition of elements, attributes, and entities.

• DTD elements and attributes are the conceptual equivalent of XML entities.

• DTD entities allow for substitution of previously constructed DTD scripting elements.

• XSD stands for XML Schema Definition.

• XSD is a more advanced form of DTD.

• XSD is constructed using standard XML structure.

• XSD allows for the same capabilities as DTD, except in much more detail.