This European standard provides core product category rules (PCR) for Type III environmental declarations for any construction product and construction service.The core PCR:- defines the parameters to be declared and the way in which they are collated and reported,- describes which stages of a product""s life cycle are considered in the EPD and which processes are to be included in the life cycle stages,- defines rules for the development of scenarios, - includes the rules for calculating the Life Cycle Inventory and the Life Cycle Impact Assessment underlying the EPD, including the specification of the data quality to be applied,- includes the rules for re