Yes it is quite simple really. Some instances of F4 Manifestation Singleton may be on carriers that were not intended as E84 Information Carriers. For example a poem scratched into a prison wall or a school desk. If the carrier was intended then you can instantiate it as a member of both classes. Hope this helps Rgds SdS
Stephen Stead Tel +44 20 8668 3075 Mob +44 7802 755 013 E-mail [email protected] _____ From: [email protected] [mailto:[email protected]] On Behalf Of João Oliveira Sent: 17 October 2007 23:10 To: [email protected] Subject: [Crm-sig] 'F4 Manifestation Singleton' and 'E84 InformationCarrier' - CRM/FRBRoo Dear All, Anyone could explain why 'F4 Manifestation Singleton' isn't a subclass of 'E84 Information Carrier'? Thanks in advance João Lima 'F4 Manifestation Singleton' Scope Note This class comprises physical objects that each carry an instance of F2 Expression, and that were produced as unique object, with no siblings intended in the course of its production. It should be noted that if all but one copy of a given publication are destroyed, then that copy does not become an instance of F4 Manifestation Singleton, because it was produced together with sibling copies, even though it now happens to be unique. Examples of instances of F4 Manifestation Singleton include manuscripts, preparatory sketches and the final clean draft sent by an author or a composer to a publisher. 'E84 Information Carrier' Scope Note This class comprises all instances of E22 Man-Made Object that are explicitly designed to act as persistent physical carriers for instances of E73 Information Object.
