1. A nametag embodied in a distributed computer system, the nametag comprising at least one logical item name field holding a logical item name, at least two corresponding volatile copy item name fields, and at least one corresponding nonvolatile copy item name field.
1. A nametag embodied in a distributed computer system, the nametag comprising at least one logical item name field holding a logical item name, at least two corresponding volatile copy item name fields, and at least one corresponding nonvolatile copy item name field. 8. The nametag of claim 1 , wherein the nametag is operative to locate a specific copy of an item using only the at least one logical item name.