An Instrument for Measuring Variability Thinking

Conference Paper
DOI /doi/10.5281/zenodo.17910370
features
	MedievalCastle {root}
		mandatory
			Castle {abstract}
				alternative
					BasicCastle 
					MediumCastle 
					CompleteCastle 
		optional
			Assault 
				or
					CombatCar 
					Archers 
		mandatory
			Style {abstract}
				alternative
					RealisticCastle 
						optional
							Knights 
						optional
							Prison 
						optional
							Drawbridge 
					FantasyCastle 
						optional
							Dragon 
						optional
							Wizard 
constraints
	RealisticCastle => ! Dragon
	Assault => ! BasicCastle