I've just learned today that one should use a capital letter after a colon in German if the second part of the sentence could be separated to make a sentence alone.
Ich habe Hunger: Ich habe heute noch nichts gegessen
(I'm guessing if I added nämlich to the second part, using a capital letter would be more controversial.)
Does this rule apply to semicolons too?
Ich habe nichts gegessen; ich habe Hunger.
Ich habe nichts gegessen; Ich habe Hunger.
I remember a literature teacher who would tell us that the partial disappearance of the semi-colon in writing was a shame, as it was a good balance between a comma which would bring a too weak separation and a full stop (period) which would be too much.