# 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: LinkSpecification
A specification of an instance of an Association. ## Specializes ## InstanceSpecification ## Constraints
Type | Name | Specification
--- | --- | ---
at least one member end of type ObjectSpecification | LRA Invariant | inv: memberEnd-&gt;select(m : <a href="$element://{38F3F6EE-235E-4afc-A210-C3AAD1A0A4FA}"><font color="#0000ff"><u>ObjectSpecification</u></font></a> | m.oclIsTypeOf(<a href="$element://{38F3F6EE-235E-4afc-A210-C3AAD1A0A4FA}"><font color="#0000ff"><u>ObjectSpecification</u></font></a>))-&gt;size() &gt;= 1
defining classifier of type Association | LRA Inv: Type | inv: self.oclIsTypeOf(<a href="$element://{9BBBD730-1846-4b88-AF8E-4EBB802F0F49}"><font color="#0000ff"><u>Association</u></font></a>)