# Logical Record Architecture for Health and Social Care
## Discharge Summary Release 0.02

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: BooleanDefaultValueSpecification
Specification of a default value of an instance of type Boolean. ## Specializes ## DefaultValueSpecification ## Attributes
Name | Data type | Occurs | Description
--- | --- | --- | ---
value | Boolean | 0..1 | The default value of an instance of type Boolean, specified by this BooleanDefaultValueSpecification.
## Constraints
Type | Name | Specification
--- | --- | ---
Instance is specification for constraint that binds to a PrimitiveType instance of kind Boolean | LRA Invariant | inv: constraint.contraintBinding.instance.type-&gt;forAll(c: Class | c.oclIsType(Primitive) and c.qualifiedName = "lra::datatypes::uml::kernel::Boolean")
Specification is exclusively by value or by reference | LRA Invariant | inv: if not self.value.oclIsUndefined() then self.valueRef.oclIsUndefined() else self.value.oclIsUndefined() and not self.valueRef.oclIsUndefined() endif