Clever 
And when I get around to implementing my idea here: [MainUI] See and edit Item metadata on the Item page · Issue #397 · openhab/openhab-webui · GitHub you’ll be able to describe your own metadata namespaces in the developer tools, so they will appear in the available namespaces in the UI (you won’t have to type it) and you’ll get a nice config sheet like the widget props to set values.
