package derivatives {
	package market_data {
		abstract class Volatility {
			double getValue(double K, date T) const;
		};

		class ConstantVolatility extends Volatility {
			double value;
		};


		class Currency {
		};


		abstract class Instrument {
		};

		class Stock extends Instrument {
			double spot;
			Volatility volatility;
			Currency currency;
		};
	}

	package products {
		abstract class Product {
			Instrument underlying;
			double lotSize;
		};

		class Vanilla extends Product {
			double strike;
			date maturity;
		};


		class Trade {
			Product product;
			double nominal;
		};
	}

	package pricing {
		abstract class Result {
		};

		class PricingIndicator {
		} PREMIUM, DELTA;

		class PricingResult extends Result {
			map<string, double> numericResults;

			double getResult(const Trade trade, const PricingIndicator request) const;
		};


		service Revaluation {
			PricingResult price(const Trade[] trades, const PricingIndicator[] requests);
		};
	}
}