The commentators state sabbe dhammaa is limited to the 5
aggregates, in the dhammapada 279, but in other parts of the canon the commentators include
Nibbana, the asankata dhatu within `Sabbe Dhamma Anattaa". The Channa
Sutta of the Khandhavagga of the Samyutta Nikaya has
All formations are impermanent, all phenomena are anatta.
Sabbe sankhara anicca, sabbe dhamma anattaa’ti.
The commentaries state in reference to this passage:
Sabbe sankhara anicca’ti sabbe tebhumakasankhara aniccaa.
Sabbe dhammaa anattaati sabbe catubhumakadhammaa anattaa.
All formations of the three planes are impermanent; all phenomena of
the four planes are notself.