Even though SAML v1.1 has been deprecated in favor of SAML v2.0, there may be installations at users end, that require support for SAML v1.1
For this reason, PicketLink v2 now has SAMLv1.1 support.
It is documented here:
This article should form the dashboard for PicketLink-SAMLv1.1 support.
Note that both the PicketLink Identity Provider and the Security Token Server (STS) support both SAML v2 and v1.1
As always, pick the latest PicketLink v2 build from