+ <news class="gamma" date="2020-12-08.">
+ λδ-2B is repackaged for publication.
+ </news>
+ <news class="gamma" date="2020-09-25.">
+ Improved theory of rst-transition.
+ </news>
+ <news class="gamma" date="2020-04-16.">
+ Sort hierarchy parameter removed from unbound rt-transition
+ (anniversary milestone).
+ </news>