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The first level of folders is very important in terms of layout and how the tags will be represent understood and represented by MQTT Transmission.  These are the rules:

• For terminology reference, please review the Sparkplug specification if you have not done so.
• Under the Tag Provider, the first folder must be exactly 'Edge Nodes'
• Under the 'Edge Nodes' folder a 'Group ID' must be next.  This can be anything you want but realize it represents a group of edge nodes.  You can have as many group IDs as you want.
• Under 'Group ID' you can one or more Edge Nodes.
• Under each Edge Node, you can have one or more devices.
• Under each device, you can have any depth of folder/tag structure to represent the tags.

In our example, we have a single Edge Node of 'CLTEST002DIRECTOR', under it a single Device called PLC1, and under it, 15 registers in two different folders.  We could rearrange this by renaming and moving folders and tags to a different representation as desired.  The layout below is also valid as was done simply by moving/renaming the tags shown above.

Image Added

Note while the folders and tags were moved and renamed, the basic structure stayed the same with:

• default
  • Edge Nodes
    • Group ID (1 to n)
      
      • Edge Node ID (1 to n)
        • Device ID (1 to n)
          • Free form folders and tags
            
            

With our tags set up as we want them, we can now install MQTT Transmission.