Unclear what content is missing in empty fields

[christian-rli]

When filling out metadata it's sometimes not clear what's required in a field. Mouse-over texts are helpful, but an additional help would be example values that appear in grey to give the user an idea.

[steull]

Hover over the 'i' on each field, a description and two to three examples might also be helpful. For this, divide the 'i' in these two aspects is an addition to the example values which appear in grey.