I assume you only want to count element children and that comments or
white space used fro indentation should be ignored:
a) all the children of answer are textcontent;
test="*[not(self::em or self::sub or self::sup)]"
is true if there is an element node that is not text content
b) all the children of answer are blockcontent;
as above, with different element names, or
test="count(*)=count(para|note|warning|table|img|define|list|ul|ol)"
c) there is a mixture of textcontent and blockcontent children
test="(para|note|warning|table|img|define|list|ul|ol) and
(text()[normalize-space()]em|sub|sup)"
In the output HTML an <answer> element is going to generate a <div>, and
case (a) will require a <div><p>...</p></div>, while in case (b) a simple
<div>...</div> will suffice.
it depends how your stylesheet is structured, but it is rather rare that
you need any explict test, usually you just let the templates for (say)
answer/para
generate the needed <p> element.,
David
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