Restriction ( Term XML Representation Element )
base type
restriction [ XML Schema Namespace ]
Subject Indicators
A type definition whose declarations or facets are in a one-to-one relation with those of another specified type definition, with each in turn restricting the possibilities of the one it corresponds to, is said to be a restriction. The specific restrictions might include narrowed ranges or reduced alternatives. Members of a type, A, whose definition is a restriction of the definition of another type, B, are always members of type B as well.
Used in simple type declarations to identify the additional constraints to be applied on the derived type. Used in complex type declarations to indicate that the derived type is a more restrictive form of the base type.