You're right that it has no Date, that's a recent addition to the standard that I haven't added the code for (you'll have to access it as a generic metadata item), but Version is definitely there, I use it in the Addon Manager, see https://github.com/FreeCAD/FreeCAD/blob ... st.py#L343
You can see the the whole list in MetadataPy.xml: https://github.com/FreeCAD/FreeCAD/blob ... dataPy.xml