museumid.net
MuseumID - Identifying museums and museum objects on the internetCurrently there is no defined standard or community agreement about unique and persistent identifiers for museum objects on the internet. Persistent identifiers used in other domains have a different scope, are not suitable to identify real-world objects or require a cost-intensive maintenance infrastructure. Provides a free and easy solution to create and use museum object identifiers. There is no need to replace already established inventory numbers or to run a complex technological infrastructure.
http://www.museumid.net/