<Page> EXHIBIT 21.1 <Table> <Caption> ENTITY NAME JURISDICTION - ----------- ------------ Informix International, LLC Delaware, USA Ascential Software Latin, Inc. Delaware, USA Ascential Systems, Inc. Delaware, USA Mercator Software, LLC Delaware, USA Vality Technology Incorporated Massachusetts, USA Ascential Software Argentina S.A. Argentina Ascential Software Pty Ltd Australia Mercator Software Australia Pty Ltd Australia Ascential Software de Bolivia S.A. Bolivia Ascential Software do Brasil Ltda. Brazil Ascential Software (Canada) Inc. Canada (Nova Scotia) Ascential Software de Chile S.A. Chile Informix Software (China) Co., Ltd. China Ascential Software de Colombia S.A. Colombia Ascential Software s.r.o. v likvidaci Czech Republic Ascential Software ApS Denmark Informix Software del Ecuador S.A. Ecuador Ascential Software S.A.R.L. France Ascential Software Integration S.A.R.L. France Ascential Software GmbH Germany Garmhausen und Partner Gesellschaft fur Softwareentwicklung und Vertrieb mbH Germany Mercator International GmbH Germany Mercator Software GmbH Germany Ascential Software (Hong Kong) Limited Hong Kong Ascential Hong Kong Limited Hong Kong Ascential Software (India) Private Limited India Ascential Software Ltd. Ireland/Barbados Ascential Holdings Company Ireland Ascential Software Ireland Ltd. Ireland Ascential Shelf Company Limited Ireland Ascential Software S.r.l. Italy Ascential Software K.K. Japan Ascential Integration Japan K.K. Japan Ascential Korea, Ltd. Korea Ascential Software Sdn. Bhd. Malaysia Ascential Software de Mexico, S. de R.L. de C.V. Mexico Ascential Software B.V. Netherlands Ardent Software B.V. Netherlands Ascential Software B.V. Netherlands Ascential Software Limited New Zealand Ascential Software AS under avvikling Norway Ascential Software de Peru S.A. Peru Ascential Software Sp. z.o.o. w likwidacji Poland Ascential Software Portugal Lda. Portugal Ascential Software Asia-Pacific Pte Ltd Singapore Ascential Software Singapore Pte Ltd Singapore Ascential Software, spol. s r.o. v likvidacji Slovakia Ascential Software South Africa (Proprietary) Limited South Africa Ardent Software Africa (Proprietary) Limited South Africa Ardent Software Data Management (Proprietary) Limited South Africa Ascential Software Iberica, S.A. Spain Ascential Software Integration, S.L. Spain Ascential Software AB Sweden Ascential AB Sweden </Table> <Page> <Table> Mercator Software AB Sweden Ascential Software AG Switzerland Ascential Software Taiwan, Inc. Taiwan Ascential Software Limited U.K. (England) Ascential IHQ Limited U.K. (England) Ascential UK Limited U.K. (England) Ardent Software Limited U.K. (England) Prism Data Warehouse Solutions Limited U.K. (England) Vmark Software UK Limited U.K. (England) Ascential Software de Venezuela, S.A. Venezuela </Table>