position() problem

Hi,
 My pb with this drives me crazy, and as my latest post did'nt get answered,
I'll give a simpler try.

Why does "document('mygloss.xml')//mot[$pos]" only gives answer for $pos=1
and returns nothing for all other values?
I've also tried some number($pos), but it didn't work.

Please any help would be great.
 François


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