What does this Tag Icon mean?

I have a few tags I created a month or so ago for some testing, a lot of water under the bridge so I don’t remember exactly what I may have done different in creating these tags…
I see that these tags have an icon that looks like an ordinary (OPC) tag icon, with a key on it.
What does this mean? (The icon for tag “Type”, if this image clip shows up)

Look at the quality property in the “Type” tag and see what it says.

Ah, I see now. Quality is ‘Demo Expired’, this tag is using OPC-COM module, which I don’t yet have a licence for.