Array variables as formal parameters ???

[John M. Dlugosz]

Please take a look at 
<http://www.dlugosz.com/Perl6/web/passing_examples.html>.
I started working through how the detailed behavior of the Capture and 
passing rules need to work, and I ran into something that startled me.  
There's no examples in S06 of formal parameters, other than the special 
*...@slurp form, that is declared with a sigil other than a $.  For example,

   sub f1 ($x, @y, @z) { ... }
Before I get any farther with this line of thought, I want to know if 
I'm missing something important.

Thanks,
--John