longevity.subdomain.ptype
a natural key for this persistent type. wraps a property that, given specific a property value, will match the corresponding member of no more than one persistent object.
the persistent type
the key value type
a property for the key
a natural key for this persistent type. wraps a property that, given specific a property value, will match the corresponding member of no more than one persistent object.
the persistent type
the key value type