I have used NOMENCLATURE in several museums and have found it to be a concise and servicable system. IT DOES HAVE ITS QUIRKS. There are numerous categories that are weak in object names. The other system to investigate would be the Getty's Art & Archetechture Thesaurus. It is quite voluminous and detailed but volunteers may have trouble with it, Patrick Reynolds Curator, Hist Soc. of Berks Co.