[tei-council] Example of <app> with multiple <lem>s

[Sebastian Rahtz]

i've removed the constraint from <app> (where the schema only allows one <lem> anyway), and put a simpler version of it in <rdgGrp> pro tem. If the content
model can be rewritten to enforce that, the constraint can go.

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Sebastian Rahtz      
Director (Research) of Academic IT
University of Oxford IT Services
13 Banbury Road, Oxford OX2 6NN. Phone +44 1865 283431