math get maximum and subtract 1

hi there,

i guess this is an easy XPATH Question:

How do i get the maximum @row# or @col# from the following inpu, and how do
i subtract that by 1

meaning if maximum rownumber is 4-1 = 3?



<DESCRIPTION_ITEM col="1" row="3">

<LABEL>Mitgeltende Unterlagen</LABEL>

<VALUE>Text</VALUE>

</DESCRIPTION_ITEM>

<DESCRIPTION_ITEM col="1" row="4">

<LABEL>Offene Fragen</LABEL>

<VALUE>Text</VALUE>

</DESCRIPTION_ITEM>

thank you,

sascha




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