(19)

(11)

EP 1 490 794 A2

(12)

(88) Date of publication A3: 22.01.2004 (43) Date of publication: 29.12.2004 Bulletin 2004/53 (21) Application number: 03712432.8 (22) Date of filing: 28.03.2003

(51) International Patent Classification (IPC)7: G06F 17/30 (86) International application number: PCT/GB2003/001385 (87) International publication number: WO 2003/083719 (09.10.2003 Gazette 2003/41)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 29.03.2002 US 368126 P 03.06.2002 US 158849 (71) Applicant: International Business Machines Corporation Armonk, N.Y. 10504 (US)	(72) Inventors: KANELLOS, Nick Ottawa, Ontario K1T 3N6 (CA) SAUNDERS, Steve Ottawa, Ontario K2A 2A9 (CA) (74) Representative: Ling, Christopher John  IBM United Kingdom Limited,Intellectual Property Department,Hursley Park Winchester,Hampshire SO21 2JN Winchester,Hampshire SO21 2JN (GB)