Sybase XML Defining derivations

Defining derivations
102 PowerDesigner
Defining derivations
You use derivations when you want to extend or restrict the values of simple
and complex types.
An XML model allows you to derive:
♦Simple types by restriction, list or union
♦Complex types by extension or restriction
Derivation in element property sheet
When you define a derivation in an element property sheet, a simple or a
complex type is automatically created within the element declaration (See
Preview page). The Embedded type property is automatically set to
Simple or Complex, and the Content property to Simple or Complex in the
case of an embedded complex type.
Deriving by extension
You derive a complex type by extension when you want to extend the values
of its base type.
For example:
USaddress is a derivation by extension of the address complex type.