Passing Form Data via SAML to a SSO login - Questions regarding bindings passed


Hi Developers,

I want to set-up a form on my website that passes form data via SAML to a SSO login.
I need to know what metadata is passed from the service provider and what bindings are supported as well as if this is an IDP initiated transaction. What would the name ID parameter be that’s passed. Basically, I need a developer who knows if and what this data is that’s passed to send over the the SSO system. Insight into this or help would be greatly appreciated.