2.2.1 [W3C-XSS] Section 2.1, Overview of XML Schema
The specification states:
[Definition:] We refer to the augmented infoset which results from conformant processing as defined in this specification as the post-schema-validation infoset, or PSVI.
No APIs are exposed for the post-schema-validation infoset (PSVI) so it cannot be tested. The internal implementation of PSVI may or may not conform to the specification. All features that depend on the PSVI should be tested separately.