Is it allowed to have empty ListOfExtensionObject in UAVariable in a NodeSet file ?|OPC UA Companion Standards|Forum|OPC Foundation

Hi Team,

I tried to search regarding ListOfExtensionObject in OPC UA Part 6 - Mappings. In OPC UA Part 6 - Mappings an example is illustrated for ListOfExtensionObject. Recently I received a NodeSet file which contained an empty ListOfExtensionObject in blue color in following XML snippet.

Is it recommended to have ListOfExtensionObject in following way or is it not a valid way to describe ListOfExtensionObject  ? 

<UAVariable NodeId="s=128.OutputArguments" BrowseName="OutputArguments" DataType="i=296" ValueRank="1" ArrayDimensions="0" MinimumSamplingInterval="100">
<DisplayName Locale="en">OutputArguments</DisplayName>
<References>
<Reference ReferenceType="HasTypeDefinition">i=68</Reference>
<Reference ReferenceType="HasProperty" IsForward="false">i=12873</Reference>
</References>
<Value>
<ListOfExtensionObject xmlns="https://opcfoundation.org/UA/2008/02/Types.xsd" />
</Value>
</UAVariable>

Best regards

Ahmad