XML Schema Complete Reference, The

15.2. Schema (Schema Schema Component)

A schema component is represented in an XML schema document by a schema element.

A schema is an object having the following set-valued properties:

• Element declarations

  A set containing the global element types. (All element types are named.) See Section 15.4.

• Type definitions

  A set containing the global (hence named) structure types (simple and complex types). See Sections 15.3.2 and 15.4.2.

• Attribute declarations

  A set containing the global (hence named) attribute types. See Section 15.3.

• Attribute group definitions

  A set containing the named attribute-use groups. (All named attribute-use groups are global and named.) See Section 15.4.6.1.

• Model group definitions

  A set containing the named model groups. (All