ACTION 2016-09-22-003 - bug 29827 - initial mode and error XTDE0045

ACTION 2016-09-22-003 MK: try to express the
rules in the form of a table. Abel phrases it in terms
that if declared-modes="yes" then the mode "doesn't exist"
unless it is declared and it then becomes an error to refer to it.

(This relates to bug 29827)

I have attempted a table giving the proposed rules at

attachment 1656 <https://www.w3.org/Bugs/Public/attachment.cgi?id=1656>

Michael Kay
Saxonica