> tei:choice should accept all tei elements as children, right?
Nope. As currently defined, <choice> can only have the following as
children: <abbr>, <corr>, <expan>, <orig>, <reg>, <seg>, <sic>,
<unclear>, and <choice> itself.
> 2) Sometimes a single runic letter ...
I'm afraid I don't really understand the question. Are you encoding
the runic letter or the two roman characters (or both)?
P.S. I will most likely not be able to respond again for a couple of