id	mappings	description
alt_description		an attributed description
annotatable		mixin for classes that support annotations
annotation		a tag/value pair with the semantics of OWL Annotation
class_definition		the definition of a class or interface
common_metadata		Generic metadata shared across definitions
definition		base class for definitions
element		a named element in the model
enum_definition		List of values that constrain the range of a slot
example		usage example and description
extensible		mixin for classes that support extension
extension		a tag/value pair used to add non-model information to an entry
local_name		an attributed label
permissible_value		a permissible value, accompanied by intended text and an optional mapping to a concept URI
prefix		prefix URI tuple
schema_definition		a collection of subset, type, slot and class definitions
slot_definition		the definition of a property or a slot
subset_definition		the name and description of a subset
type_definition		A data type definition.
unique_key		a collection of slots whose values uniquely identify an instance of a class

