OPC Studio User's Guide and Reference
TopicPrefixHead Property (UADataSetSubscriptionDescriptor)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.PubSub Namespace > UADataSetSubscriptionDescriptor Class : TopicPrefixHead Property
The head of the prefix used in topic name construction.
Syntax
'Declaration
 
<DefaultValueAttribute("opcua")>
<NotNullAttribute()>
Public Property TopicPrefixHead As String
'Usage
 
Dim instance As UADataSetSubscriptionDescriptor
Dim value As String
 
instance.TopicPrefixHead = value
 
value = instance.TopicPrefixHead
[DefaultValue("opcua")]
[NotNull()]
public string TopicPrefixHead {get; set;}
[DefaultValue("opcua")]
[NotNull()]
public:
property String^ TopicPrefixHead {
   String^ get();
   void set (    String^ value);
}
Remarks

The default value, given by the OPC UA specification, is "opcua".

An empty string denotes that in the topic tree, any value can be present at this topic level.

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also