There has been added a new schema version wildfly-undertow_12_0.xsd in current JBoss EAP 7.4.0.GA-CR1 build. It contains definitions of following types:
Although, this schema imports wildfly-credential-reference_1_1.xsd schema which defines the very same types but don't utilizes it. I think we should remove these extra types definition from this schema and utilize what is being imported from wildfly-credential-reference_1_1.xsd file.
This is basically same issue as described here
Even though this doesn't have a huge impact on the customer, I'm gonna raise this to a blocker for now because we won't be able to update/modify these spec files after the 7.4.0.Final release. Potential fix should be quite straightforward - basically what was done in referenced