schema.org issues with e!DAL

[Zalfsten]

This is a meta issue that collects all e!DAL-related schema.org issues that have been collected by taskarea 3 as sub-issues.

[Zalfsten]

These issue have been forwarded to Daniel Arend in his role as responsible contact partner for the e!DAL-PGP repository. He has direct access to the issues in this repo.