# Logical Record Architecture for Health and Social Care
## Discharge Release

Contents
The content of this release is not comprehensive and is not fully validated and must not be used in live system implementations.
# Reference Model Class: SctLiteralExpressionSpecification
A reference to a constraint expression which restricts the possible ways that an instance of a SNOMED CT terminology expression may be constructed to represent a given meaning. ## Specializes ## ValueSpaceSpecification ## Constraints
Type | Name | Specification
--- | --- | ---
Instance is specification for constraint that binds to a PrimitiveType instance of type SnomedCtExpression | LRA Invariant | inv: constraint.contraintBinding.instance.type-&gt;forAll(c: Class | c.oclIsType(Primitive) and c.qualifiedName = "lra::datatypes::uml::derived::SnomedCtExpression")
## Reference Model Type ##