idk though, I came to realize some bits of the 4e dmg were lifted from the 3.5 dmg2 lol. in fact I felt like dmg2 was the precursor to the 4e dmg.
OK. I Don't own that one. So thanks for the correction.
FWIW- Some of the bits I was talking about in the 4E DMG were the world/campaign building chapters.