/usr/mdec does get a whole 3 words in hier(7). (-:
Is there no mention of mdec in the #NetBSD Guide?
Hmmm.
This looks like another thing in chapter 22 that needs fixing.
If you pass a NetBSD person at all, please tell them that someone has some improvements to the Guide for them.
* http://jdebp.info/FGA/BSDs-for-Linux-users/guid-partition-table.html