RE: [saml-dev] Question about transferring data between sites

> Has anyone worked with including the information as part of 
> the initial call when the artifact is passed to the SP?

You really can't do that, RelayState is <=80 bytes. If you need to pass
something related to the user or assertion, it can go in an attribute or in
Advice, but only in the actual assertion itself. Otherwise, it doesn't seem
to be appropriate, and there's no interoperable place to put it.

-- Scott