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How do I delete or remove tags from my DataHub?

There are tags in my DataHub I no longer need and I would like to remove them.  How can I do this?

Version 11 and later

In the Data Browser window, highlight the tag you want to remove. You can Ctrl+left-click to select multiple tags, or Shift+left-click to select a continuous group of tags.

Then, right-click and select "Delete Point" to remove the tag(s).

Version 10 and earlier

The DataHub only removes tags form its address space (i.e. domains) upon shutdown.  This is to ensure any client connected to these tags gets a graceful Shutdown message from DataHub instead of removing tags from the DataHub Server while a Client is trying to access them.
 
To remove any tag in the DataHub you first need to make sure you are no longer referencing that item from any external connections to DataHub but also internal ones.  Keep in mind that the various plug-in features and scripts you may have created in DataHub act as internal clients, and if they are referencing a tag, the tag won't be removed.
 
Once you have removed all uses of the tag you need to restart your DataHub.  If your DataHub is connected to another DataHub using the Tunneling feature you will need to remove the tag from the Source DataHub and restart both DataHubs.
 
If after a restart the tag is not removed, that means that somewhere, internally or externally a tag is being referenced in your configuration or scripts.