CPE 2.3 Naming Adam Halbardier 2.3 2011-07-29 Define the format for acceptable CPE Names. A URN format is used with the id starting with the word cpe followed by :/ and then some number of individual components separated by colons. Define the format for acceptable CPE Names. A string format is used with the id starting with the word cpe:2.3 followed by : and then some number of individual components separated by colons.