| Name | Type | Description | 
| messageArg | KeyAnyValue[] | Provides named arguments that can be used to localize the
 message in the catalog. 
 | 
| messageCatalogKeyPrefix | xsd:string | Key to the localized message string in the catalog.
 If the localized string contains parameters, values to the
 parameters will be provided in #messageArg.
    E.g: If the message in the catalog is
 "IP address is {address}", value for "address"
 will be provided by #messageArg.
    Both summary and label in ElementDescription will have a corresponding
 entry in the message catalog with the keys
 .summary and .label
 respectively.
 ElementDescription.summary and ElementDescription.label will contain
 the strings in server locale. 
 | 
| Properties inherited from ElementDescription | 
| key | 
| Properties inherited from Description | 
| label, summary | 
| Properties inherited from DynamicData | 
| None |