The AlpineBits HotelData standard has been published in its 10th release by October 2020. While the standard allows a great amount of use cases, there is one open AlpineBits implementation for the Open Data Hub. It is freely available on Github and can be used as reference implementation. The middleware acts between the Open Data Hub infrastructure and the classical AlpineBits server interface to publish open data from the Open Data Hub. The presentation talks about the architecture and some helpful hints and tricks on how to approach an AlpineBits implementation.