3.8.1 Interfaces

Mandatory interfaces defined in a new FDT minor version may not be defined in older versions. Therefore components designed for the older FDT version will not implement these interfaces. Although the system runs under the newer FDT version defined by the Frame Application the components need to be aware that an interface may not be supported if the server component is based on a lower FDT version.

Example: A DTM for FDT version 1.2.1 must not rely on the interface IDtm2. Although this interface may be defined mandatory for a DTM with FDT version 1.2.1, it must be possible to connect the DTM to an other DTM with FDT version 1.2 which supports only IDtm.