In 2.1 it is allowed, that Entity Statement from an intermediate over a leaf entity also contains “metadata” claim.
In result, in the trust chain for a leaf entity X as per notation in 7.2 we have:
ES - self statement of entity X, iss=X, sub=X
ES - statement of intermediate Y over X, iss=Y, sub=X
Both ES and ES can contain “metadata” claim (as per 2.1) with the same subject sub=X. The specification is not clear whether in such situation:
- it is intended or allowed to have such duplication
- it shall be verified if the two are identical and if not, whether such statement shall be rejected