OpenSAML user discussion

Hi Friends,
          I have very basic idea of what SAML is? I am implementing SSO 
[Single Sign On] for our project and we have WebLogic 8.1 server. I have 
already implemented security providers for authentication and authorization, 
only part left is Credential and identity asserter, I want to implement SAML 
for SSO. Now, the question is how to make a SAML token so that I can assert 
identity in my identity asserter provider implementation. I downloaded 
openSAML but didn't found any tutorial as how to get start with it.
I seen one example that test the signature [comes with openSAML download], 
the question is are we going to provide assertion.xml file in each request or 
we have to generate it.I am not sure as to how it will work as a SSO, also 
any code snippets or link will help me to figure out the work I need to do 
for using SAML and OpenSAML for SSO. 

I want to know in and out of SAML implementation as token and all the 
required help in this will be greatly appreciated.


Regards,
Shailesh