No other SAML IdP software is known to support entity attributes at this time.
IdPs are broadly taking one of two approaches to releasing attributes to R&S SPs:
- Configure an IdP to Release a Fixed Subset of R&S Attributes. This sends the same subset to every R&S SP.
- Configure an IdP to Release a Dynamic Subset of R&S Attributes. This sends a filtered version of the subset defined by the IdP using the
<md:RequestedAttribute>element as a filter.
If an IdP restricts attribute release to some subset of R&S SPs, can that IdP declare support for R&S?