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Tag Format and Application
An asset tag is primarily composed of a Category:Value pair. For example, if you want to group your assets by location, create a Location category with the value Headquarters.
You can apply a tag to assets either manually or automatically based on tag rules you specify. For example, if you want to apply the Location:Headquarters tag to assets within a specific IP address range, create a tag rule with that condition. Tenable.io then applies the tag based on asset attributes. Automatically applied tags are sometimes referred to as dynamic tags.
Tenable.io applies a dynamic tag when you add a new asset (via scan, connector import, or leveraging the Tenable.io API). When you update an existing asset, Tenable.io re-evaluates the asset and removes the tag if the asset's attributes no longer match the tag rules.
Tenable.io also re-evaluates tagged assets when you create or update tag rules.
If you manually apply a tag that you've also configured with rules, Tenable.io excludes that asset from any further evaluation against the rules. To restore dynamic evaluations of the asset, remove the asset from the Excluded Assets list for that tag.
When configuring tag rules, you can use most filters you would use to search for assets in the assets workbench. Supported filters include other tags. Unsupported filters include certain computed fields; for example, Last Seen and Is Licensed.
You can use the following icons to distinguish tags you've applied manually from automatically-applied tags:
|Location||Manual Application||Dynamic Application|
|Tags column of the tags table (Settings > Tags)|
|Tags section of the asset detail page (Dashboards > Assets)||(no icon)|