XML Schema Complete Reference, The

5.5. Schema Documents

The document element of a schema document is a schema element. schemas are made up of elements of various other types; there are element types corresponding to the different schema components. An element element corresponds to an “element declaration schema component”—a (Schema-defined) element type. A simpleType element contains the information necessary to create a simple type (a “simple type definition schema component”). Details of the use and construction of the various types of elements in a schema document are found throughout Part II of this book.

More than one schema document may contribute to a schema for either or both of these reasons:

• Useful parts of the schema can be separated out as reusable modules.

• Different ...