In r59144 , a bunch of internal-use constants were dumped in the main namespace. These all need to be prefixed with an underscore. They should be fixed right-away before people start using them. Since they are externally undocumented and since the internal notes describe them as being only for internal-use, I think this can go in as a bugfix.
Mark, it looks like r59144 merely moved these around and that they existed beforehand. Can we go ahead and get them renamed? They are defeating the extensive efforts we've made to keep that namespace free of anything that isn't part of the documented spec.