NEW YORK (Standard&Poor's) Aug. 1, 2006--Standard&Poor's Ratings Services said today that it raised its corporate credit ratings on DPL Inc. and its regulated subsidiary, Dayton Power&Light Co. (DP&L), to 'BB+' from 'BB'. In addition, Standard&Poor's raised its rating on DP&L's first mortgage bonds to 'BBB' from 'BBB-'. The outlook is positive. Dayton, Ohio-based DPL had about $1.7 billion of debt outstanding as of March 31, 2006. "The rating action incorporates the company's continued improvement in its financial profile with the reduction of about $450 million of debt and improved cash flow generation from its core utility operations," said Standard&Poor's credit analyst Todd Shipman. "The upgrade also reflects the company's focus