Editing Ogre:CharacterCodex:Introduction (section)

====Aptitude only system====
Aptitudes describe a broad range of general capabilities of your character that cover many possible actions. When using an aptitude, the ability modifier that you use is different depending on the action you are doing. Choose the ability that best match the action you are doing. While you do not use skills, they can be used as a guideline for choosing the appropriate ability modifier. They can also be used to know what are the possible actions made with a particular aptitude.
For example, in a fight, you are using your Combat aptitude to attack an enemy. You have 3 ranks in your Combat aptitude, a +2 Strength modifier and a +1 Dexterity modifier. If you are striking with a melee weapon, you add your Strength modifier to your aptitude. You have a +5 bonus to your roll (3 Combat + 2 Strength). But if you are firing an arrow, you use your Dexterity modifier. You have a +4 bonus to your roll (3 Combat + 1 Dexterity).