Just hadn't gotten there yet. I changed a few of the docs in the src/test/resources over to using the 2.2 namespace, but not all of them yet. I'll add this ticket to the 2.2 milestone and flag it to be done.
okay, cool. Does the test suite include the bibtex-based citation styles too? (Just started testing emld / eml2 against 2.2.0 schema in https://github.com/cboettig/emld/tree/eml-2.2 and realized these were all still at 2.1.1)