A way to create a subset of external entities is needed
Sometimes, it is well known for instance which file formats or metadata standards are in use for a discipline (or are supposed to be used..). It should be possible for a template designer to create a subset from existing external entities (and add some manual ones maybe).
This needs to be stored somewhere else than the EEStoreCache, but items copied from the EEStoreCache should point back probably.
This will also need a new question type: the curated list on top and a normal eestore lookup below.