Abstract types

structure types or union types have an optional isAbstract attribute which specifies if the type is abstract, meaning that it can not be directly used in a Data or a structure field.

This can be useful for example if you extend a service and you don't want to use the type upon which you extend.

Example

In the following example it is not allowed to use the abstractPosition type:

      <types>
         <simpleType name="int" baseType="int" />
         <simpleType name="float" baseType="float" />
         <structType name="abstractPosition" isAbstract="true">
            <field name="latitude" type="float" />
            <field name="lontitude" type="float" />
         </structType>
         <structType name="Position2Element" >
            <extends name="abstractPosition" />
            <field name="elementID" type="int" />
         </structType>
      </types>