PROCEDURAL_MODEL_SCHEMA
short long

e	Explicit_procedural_representation_item_relationship
e	Explicit_procedural_representation_relationship
e	Founded_item
d	Founded_item_select
d	Identifier
e	Indirectly_selected_elements
fr	Item_in_context
d	Label
e	Procedural_representation
e	Procedural_representation_sequence
er	Representation
e	Representation_context
er	Representation_item
er	Representation_item_relationship
er	Representation_relationship
dr	Text
e	User_selected_elements
fr	Using_representations
e	Variational_current_representation_relationship
er	Variational_representation