This class comprises activities that result in instances of F5 Item coming into existence. The creation of a new copy of a file on an electronic carrier is also regarded as a Carrier Production Event. Typically, the production of copies of a publication (no matter whether it is a book, a sound recording, a DVD, a cartographic resource, etc.) strives to produce items all as similar as possible to a prototype that displays all the features that all the copies of the publication should also display, which is reflected in property R27 used as source material F24 Publication Expression.