Ok. What you are asking is great. Not as trivial or simple as an extra field, but indeed a much needed and powerful improvement, which would make UNA much more capable as a framework. We already have the underlying logic to enable relationships, however more work is required to provide UI for customising them and support across core apps to adopt them.

The ticket will be for UNA 15. I'll follow up once it's created.

Hi @Andrey Yasko , Any chance this is in pipeline for any of the upcoming releases ?