Ottoman 'Conquer Mesopotamia' mission question

[Cossack_PL]

I have a question about part of code in bold. To let the mission pop up, do I have to not own any province in Mesopotamia or just I cannot own it whole?

conquer_mesopotamia = {
	
	type = country

	category = MIL
	ai_mission = yes
	
	target_provinces = {
		region = mesopotamian_region
	}
	allow = {
		tag = TUR
		owns = 382
		[B]mesopotamian_region = {
			NOT = { owned_by = ROOT }
		}[/B]
		is_subject = no
	}
	abort = {
		is_subject = yes
	}
	success = {
		all_target_province = {
			owned_by = ROOT
		}
	}
	chance = {
		factor = 1000
		modifier = {
			factor = 2
			owns = 418 # Kurdistan
		}
		modifier = {
			factor = 2
			mil = 4
		}
	}
	immediate = {
		every_target_province = {
			add_claim = ROOT
		}
	}
	abort_effect = {
		every_target_province = {
			remove_claim = ROOT
		}
	}
	effect = {
		add_prestige = 5
	}
}

 

[Oahkoah]

I believe it means that as long as there is a province in the Mesopotamia region that you do not own then you can get the mission

 

[InFerroVeritas]

I got the "Conquer Mesopotamia" mission while owning about half the region.

The actual clause you're looking for is NOT = { owned_by = ROOT }. In this case, ROOT = Ottomans (TUR), as established just prior. owned_by = ROOT is saying "ALL of Mesopotamia is owned by the Ottomans." Adding the NOT modifier in front means the inverse; so long as all of Mesopotamia is not owned by the Ottomans, you can theoretically get the mission.