Originally Posted By: MarioD

It might be a regional thing. D9 and Dm9 over here includes the 7th, the C. Here your D-F#-A-E would be called Dadd9 and the D-F-A-E would be called Dmadd9. At least that's how it was taught to me.

Thanks, Mario.
I'm always interested in these variations.
This is probably a Rock musician thing, a bit like the different ways
Rock and Classical musicians interpret 7ths over here.
Cheers,
ROG.