question about shibboleth and perl script redirection

[Joseph Norris]

Ok - very very new to shibboleth.

I have provided the identity service provider with my metadata and it 
appears to check out with them.

I have a login script that logs into my system and I need to redirect 
the users to the shibboleth identity service provider.  I am floundering 
in two aspects:

1)  In my redirect what do I need to provide in the query string to the 
provider?
2)  If I get number 1 correct what will be the return?  a piece of xml 
that I can slice'n'dice?

Thank you for any and all help - example redirect code would be 
fantastic.  I just need to know what needs to be sent.

If I have been unclear - please direct me on how I might clarify this issue.

thanks again.

-- 
#Joseph Norris (Linux/Apache/Mysql/Perl - what else is there?)
print @c=map chr $_+100,(6,17,15,16,-68,-3,10,11,
16,4,1, 14,-68,12,1,14,8, -68,4,-3,-1,7,1,14,-68,
-26,11,15,1,12, 4,-68,-22,11,14,14,5,15,-90);