# 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: Selection
A named set of one or more permissible classifier types (i.e. cases) and the constraints and / or re-definitions specified for each. This class enables the specification of one or more alternative classifier types for this Property, each of which optionally specifies a set of embedded constraints that apply to all instances of the type. ## Specializes ## Property ## Attributes
Name | Data type | Occurs | Description
--- | --- | --- | ---
isDerived | Boolean | 1..1 | True if the value of the attribute is derived from information elsewhere. The default value is false.
isOrdered | Boolean | 1..1 | True if the values in a multivalued instantiation of this class must be sequentially ordered. Default is true.
isUnique | Boolean | 1..1 | True if the values in a multivalued instantiation of this class must be unique. Default is true.
aggregation | AggregationKind | 1..1 | Specifies the kind of aggregation that applies to the Property. The default value is none.
lower | Integer | 1..1 | The lower bound of the multiplicity interval.
upper | UnlimitedNatural | 1..1 | The upper bound of the multiplicity interval.
isAssociation | Boolean | 1..1 | True if property is an association; otherwise false.
## Relationships
Name | Class | Occurs | Description
--- | --- | --- | ---
case | Case | 1..* | A specified case of this Selection.
referent | Referent | 0..1 | The permissible referent type(s) to which an instance of this property may refer. This applies only to properties that act as object references, i.e. attributes (typically of classifier kind lra::datatypes::iso21090::II) whose instances identify other objects. Only a single level of recursion is permitted; i.e. the referent instance is not permitted to contain a case that contains another referent.
## Reference Model Type ##