Nullable Element (RDL)

Indicates whether the value for the parameter can be null.

Синтаксис

<ReportParameter Name="...">
       ...
        <Nullable>...</Nullable>
       ...
</ReportParameter>

Characteristic	Description
Data type and length	Boolean
Default value	False
Cardinality	0-1: Optional element that can occur once or not at all.

Relationship	Element
Parent element	ReportParameter
Child element	None

If the value of the Nullable element is False, and the sibling Prompt element is omitted, the sibling DefaultValue element is required.