2011-12-04 12:10:26: Created issue 'Document conformance has to be stable over the time' nickname valiity-stability owned by Julian Reschke on product HTML 5 spec, description 'On several places conformance of document relies on external registry which is
not versioned -- it can add or remove any value at any time. This means that
for frozen document its validity can change.
Each edition of HTML spec should include snapshot of registries that can
easily change over the time to create more stable grounds for assessing
>)' non-public [Julian Reschke]