key	description	type	pattern
inPromotion	Item is in promotion or not	BOOLEAN	^true|false$
promotion.discountRate	Discount rate. E.g\: 30% or -30% (both are accepted).	STRING	^(-)?\d+(\.)?\d*\s*%?$
promotion.end	Date with the format ISO8601.	DATE	See ISO8601
promotion.perUnitPrice	Unit price for the normal price.	NUMBER	^([1-9]\d*(\.\d+)?)|(\d+\.\d*[1-9]\d*)$
promotion.regularPrice	Price before application of the promotion.	NUMBER	^([1-9]\d*(\.\d+)?)|(\d+\.\d*[1-9]\d*)$
promotion.start	Date with the format ISO8601.	DATE	See ISO8601
promotion.text	Text of the promotion	STRING	^.*$