What you are asking for, in V17, and I believe all other versions, doesn't exist.

The model Siemens uses with Unified in Openness is to directly edit the HMI device in the project. While the Openness application is running, you can literally see tags appearing in lists, and items appearing on screen and moving around.

I originally had an application working with XML export for Comfort panels (e.g. TP700). When the Openness for Unified came along, I abstracted the hardware into a lower layer (more or less) and kept the interface the same, so that my application code didn't know the difference between the hardware.

• "Exporting" a unified panel became simply getting a handle for the Unified device in Openness.

• Previously, add/modify/delete screen attributes simply did so in the XML; now it does that only for Comfort panels (etc), but now for Unified, manipulates the associated children of the Unified device.

• "Importing" a unified panel doesn't do anything, because this step is not required.

I can update this answer with specific examples if you like.