[xsl] xpath expression - select first node from last parent

["Andrew Welch" <andrew@xxxxxxxxxxxxxxxxxxxxxxx>]

Hi,

I would like an generic Xpath expression that will match the first child of
a parent that is positionally last.

For example, using this highly descriptive piece of ascii art:

     a---a---a---a---a
                     |
                     b---b---b---b
                     ^

All 'b' elements are children of the last 'a' element.  I want to be able to
recognise when Im at the first b of the last 'a'.

Something like:

*[position()=1]

and

parent::*[postion()=last()]

combined.


cheers

andrew

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