WeaponTypes

Weapons come in one of three damage types and are denoted as being either one or two handed.

The Damage types are Slashing, Piercing, And Blunt and each fares favorably against different Defense types. as shown below.

Slashing
Slashing weapons are denoted with a Slash value this value is added to the Hit roll against PDA

Piercing
Piercing weapons are denoted with a Peirce value this value is deducted from the enemies PDR

Impact
Impact weapons are denoted with a Impact value, this value increases the damage of the attack when preforming PDN calculations only.

So following PDN damage with Impact weapons is calculated without its Impact value.