xsltproc -maxdepth

Hallo everyone,

I admit, haven't dealt with xslt for a long time. However, I bumped into this
option "xsltproc -maxdepth", and couldn't find a sufficient information of
what exactly it controls ("max. template stack depth" - which doesn't mean
nothing to me). Could any provide me with more info of which problem is solves
(ok, max nr of recursion, but recursion of what exactly?) , and how exactly it
has been solved.

Greetings,