OpenSAML user discussion

I tried to implement this
if the user clicks a link that is going to another site, i want to send SAML 
assertion with my company name in it. and i am trying to digitally sign our 
domain information so that only the recipent will know that the request is 
coming from us.

am i going in the right direction? i got the above example XML from securing 
web services with WS-security jothy rosenberg book listing 6.8.
please giove me some direction on this