MELBOURNE -- Standard&Poor's CreditWire 8/27/98 -- Standard&Poor's today downgraded its public information (pi) rating on the Development Bank of Singapore Ltd. (DBS Bank) to single-'Api' from double-'Api'. At the same time, Standard&Poor's affirmed its 'pi' ratings on four Singapore domestic banks, namely Oversea-Chinese Banking Corp. Ltd., United Overseas Bank Ltd., Overseas Union Bank Ltd. and Keppel TatLee Bank Ltd. (formerly known as Keppel Bank of Singapore Ltd.), and withdrawn the 'pi' rating on Tat Lee Bank Ltd., following the bank becoming a wholly owned subsidiary of Keppel TatLee Bank (see list below). The rating downgrade on DBS Bank reflects Standard&Poor's view that the bank's near-to-medium financial profile has been impacted by the