[tei-council] tricky situations for using @validUntil

[Kevin Hawkins]

When I did the cleanup of "no longer recommended" and "deprecated" 
practices back in June, there were three places in which I couldn't 
figure out where to insert @validUntil:

a) https://sourceforge.net/p/tei/feature-requests/294/#5737

b) https://sourceforge.net/p/tei/feature-requests/383/?limit=10&page=1#bbe8

c) https://sourceforge.net/p/tei/bugs/288/?limit=10&page=3#99f0

I'd be happy if someone who understands ODDs better than me could 
intervene on these.

Thanks,

Kevin