When a complex type in an output/input structure has derived types, either by extension or restriction, the user can choose a derived type and the mappings can be defined using elements of selected derived type.

This is explained with an example. Sample schema used is as provided below:

Sample Schema with derived types

The schema provided above contains an element SamplePublication of type Publication. The type Publication has two derived types: BookPublication (extension) and PaperPublication (restriction). When the schema is loaded in Mapper, the element SamplePublication is shown in Mapper.


Figure 1: Sample Publication with default type

Since the type Publication has derived types, user can change the type of the element SamplePublication. All the derived types will be shown when right-clicked on the SamplePublication element and the user can select the required derived type as shown in the figure below.


Figure 2: Available derived types

When a different type is selected, the structure will be refreshed to show the selected type.


Figure 3: SamplePublication element when BookPublication type is chosen

Mappings can be defined assuming that the element SamplePublication is of BookPublication type.

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When derived types are used, the input/output must comply with the type used.

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