You can create a mapping template from a mapping that includes a mapplet. Or, you can import a mapplet and add the related mapping objects to the mapping template. The mapplet properties are read-only. The mapplet transformations and transformation logic are not visible in Mapping Architect for Visio.
Use mapplets only when you create a mapping template from a mapping. If you manually add a mapplet to a mapping template, or if you use a mapplet as a source, the Import Mapping Template Wizard may not generate the mapping correctly.
The following table describes the required property for a mapplet: