This boolean attribute indicates whether a Unit Price Specification is a list price (usually a vendor recommendation) or not. "true" indicates it is a list price, "false" indicates it is not. It is safe to assume by default that a Unit Price Specification that lacks this attributes is not list price.
DEPRECATED. Use the gr:priceType property instead.This boolean attribute indicates whether a gr:UnitPriceSpecification is a list price (usually a vendor recommendation) or not. "true" indicates it is a list price, "false" indicates it is not.
DEPRECATED. Use the gr:priceType property instead.