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Shared or common functionality for the communication via DDS is bundled in the cpm library (cpm_lib). This library is written in C++ and is used by the vehicle, the LCC and the Middleware. The HLC, on the other hand, is supposed to be more or less independent from the implementation language of the library. Programmers of the HLC programs should not be troubled with its implementation details. Thus, it was decided to create a Middleware which performs most of the communication tasks that otherwise would have to be implemented in some form in the HLC, which might not be able to use a C++ library.

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