Application profiles enable "mixing and matching" metadata elements, in order to meet specific requirements for a particular context. As an example, some communities may want to make certain elements mandatory or restrict the value space of a particular element.
However, there is much confusion and only limited experience and expertise in the development and deployment of application profiles. That is why the CEN/ISSS Learning Technologies Workshop has decided to develop guidelines on the use of application profiles for (e-)learning. This paper highlights the main results of this work, and was co-authored by the three experts that drafted the CEN document [4].