[oXygen-user] Read only section of Xml

Hello Group! I'm wondering if there is a way to markup a section of xml as readonly and then for Oxygen to honor this by either blocking or warning you of making changes within this section. Scenario is simple. You have current content in some Xml node and then you stash historical content in some other Xml node that you intend to keep around but not to edit. This would be useful to me because I'll take the current information in my Xml and stuff it into the historical section of my Xml as I roll into a new season. The issue I am having is accidentally changing content in the historical section of my Xml but I intended to make those changes in the current Xml node. This is not mission critical, but would be a nice feature. Karl..