In my understanding, this restriction can be better stated as follows:
Pattern is illegal if (and only if) its content model automaton has two consecutive
transitions by characters. I think this is what we want to avoid.
Consider the following pattern:
<group>
<string> abc </string>
<data type="integer" />
</group>
The content model automaton will be
state: q0 (initial)
#PCDATA("abc") --> q1
state: q1
#PCDATA(integer) --> q2
state: q2 (final)
Therefore it has two consecutive transitions by string (q0->q1->q2),
thus it is invalid.
Oh, I found that we have to exclude consecutive transitions by anyString.
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Kohsuke KAWAGUCHI
Phone: 650-786-0721
