NEW YORK (Standard&Poor's) Nov. 29, 2006--Standard&Poor's Ratings Services said today it revised its outlook on discount retailer Dollar General Corp. to negative from stable, and affirmed the 'BBB-' corporate credit and senior unsecured debt ratings on the company. "The outlook revision is based on our expectation that Dollar General's recently announced store closures and elimination of the company's packaway inventory management model will result in depressed margins through fiscal 2007," said Standard&Poor's credit analyst Jackie Oberoi. The ratings on Goodlettsville, Tenn.-based Dollar General reflect its solid position in the "extreme value" U.S. retail segment, and good cash flow protection measures. Tempering factors include the company's participation in the highly competitive discount retail environment, and