Is True Damage a type of Percent Damage? (Maul under LV with percent damage increase datacron)

Sorry for the late reply! Thanks for all the help. The datacron I am talking about is Darth Vader's datacron, not Lord Vader's. The description is "Percent Health damage enemies receive is increased by 300%". And I was wondering if the true damage "Maul's seething rage" does is increased by 300% as well.

I understand that "Anguish" gives Maul extra offense, but I was asking "Seething rage" itself.