Yes, that's correct. The support for extended forms is not completed. There's some work on the issue tracker by a contributing developer that adds support for extended forms, but it hasn't been possible to go through that work yet.
Question
XAdES4j documentation says that
XAdES4j can verify signatures in any of the four main XAdES forms.
Does that mean that it verifies XAdES BES, EPES, T and C (and does not verify X, XL and A)?
Solution
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