Requirements for SAML2 Identity Providers v20160916 (Draft)
The following describes the technical and administrative checks that will be made before an identity provider is admitted into the SAFIRE federation within the SAML2 Technology Profile. It also serves as a checklist for identity provider operators for assessing their readiness to participate.
Metadata
MUST1 have an entityID that is a URL (well-known location). The URL SHOULD use the https scheme and it is RECOMMENDED that valid metadata be available at this URL.