id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
210	Add template system for item types	dstillman	dstillman	Add a way to base item types on other types -- this is needed both to allow the creation of custom item types with fallback to standard types for export, [http://chnm.grouphub.com/projects/310105/msg/cat/2333974/2995041/comments#3447680 as Elena suggested], as well as to allow us to add a whole bunch of secondary built-in types (Letter in Book) that do the same thing.	enhancement	new	major	1.0 Beta 2	data layer	1.0			erazlogo