EXPLICIT_CONSTRAINT_SCHEMA
short long

d	Atom_based_tuple
d	Atom_based_value
er	Boolean_expression
er	Bound_variational_parameter
fr	Compatible_spaces
d	Constraint_group_member
e	Defined_constraint
d	Elementary_function_enumerators
d	Elementary_space_enumerators
e	Environment
e	Equal_parameter_constraint
e	Explicit_constraint
er	Expression
d	Extension_options
e	Founded_item
d	Founded_item_select
e	Free_form_assignment
e	Free_form_constraint
e	Free_form_relation
e	Generic_expression
e	Generic_variable
d	Identifier
fr	Item_in_context
d	Label
d	Lower_upper
d	Maths_atom
d	Maths_binary
d	Maths_boolean
d	Maths_enum_atom
d	Maths_integer
d	Maths_logical
d	Maths_number
d	Maths_real
d	Maths_simple_atom
e	Maths_space
d	Maths_string
d	Maths_tuple
d	Maths_value
er	Maths_variable
d	Open_closed
d	Ordering_type
d	Repackage_options
e	Representation
e	Representation_context
er	Representation_item
e	Simple_generic_expression
e	Simultaneous_constraint_group
d	Space_constraint_type
d	Symmetry_type
dr	Text
er	Unbound_variational_parameter
fr	Used_variables
fr	Using_representations
fr	Values_space_of
e	Variable_semantics
er	Variational_parameter
er	Variational_representation_item