In addition to the above types, Chakra7 also offers an additional type called global values. These are system wide categorizations that can be used in various object definitions.
In many systems, data needs to be categorized into one (or more) of several distinct categories. For example, a Book object may have a Genre property which can be any value from the list of available Genres. Further, perhaps within the same system an Author object can have a Genres parameter with multiple Genre values.
For this special case where you have a fully exhausted enumeration of the various options, a new Global Value can be created and used in various ways by different aspects of the system.