> $seq[>>EXP]    everything in $seq after the first item that
satisfies EXP
> $seq[>>=EXP]   everything in $seq after and including -"-
> $seq[<<EXP]    everything in $seq before the first item
that satisfies EXP
> $seq[<<=EXP]   everything in $seq before and including -"-

...
Any solution that involves first finding the index position of the first
element that has @page='2' and then selecting by position is a bit of a
hack, and a solution that involves recursion is beyond the abilities of 90%
of the user base.

These operations assume two logical steps:
 1) locate item of sequence;
 2) get result subsequence;