Some of Microsoft Corp.\u2019s biggest rivals lodged a new complaint with the European Commission Wednesday over its Office applications suite and other, upcoming products, arguing that the company\u2019s business practices are shutting out competitors.A coalition called the European Committee for Interoperable Systems (E.C.I.S.), which includes vendors such as IBM Corp., Nokia Corp. Oracle Corp., RealNetworks Inc. and Red Hat Inc., announced that it had made a formal complaint to the Commission over a "range of products present and future." The reference to future products is understood to be Microsoft\u2019s Vista desktop operating system, due for release later this year. One example of the issues raised in the complaint is Microsoft\u2019s refusal to disclose interoperability information for its Office suite, a lawyer representing ECIS said. By refusing to provide data such as the file formats for .doc, .xls, and .ppt documents, the company prevents other applications suites such as OpenOffice and StarOffice from achieving full compatibility, according to attorney Thomas Vinje, acting for ECIS. "This has crucial implications for Linux on desktops," Vinje said. ECIS said it was calling on the Commission, which is the European Union\u2019s antitrust watchdog, to end Microsoft\u2019s harmful business practices, which it said threaten to "deny enterprises and individual consumers real choice among competing software products."The company\u2019s behavior served to "reinforce Microsoft\u2019s existing monopolies and extend its market dominance into a range of existing and preannounced future product areas," ECIS said. The groups members also include Sun Microsystems Inc., Corel Corp., Linux vendor Linspire Inc. and browser vendor Opera Software ASA.While the complaint is separate from the Commission\u2019s ongoing antitrust case against Microsoft, ECIS said in a statement that the complaint involved "bundling and interface nondisclosure practices similar to those the Commission declared illegal in its 2004 (antitrust) decision" against Microsoft. It called for the limits on "Microsoft practices established in European antitrust law" to be "rapidly and broadly enforced." Microsoft dismissed the latest charges. "We have come to expect that as we introduce new products that benefit consumers, particularly with the kind of breakthrough technologies in Office 12 and Windows Vista, a few competitors will complain," the company said. "ECIS is a front for IBM and a few other competitors who constantly seek to use the regulatory process to their business advantage. When faced with innovation, they choose litigation," it continued.The company will respond "quickly and comprehensively" to any request from the Commission for information about the complaint, although so far it has received none, it said.A spokesman for E.U. competition commissioner Neelie Kroes said the Commission would "examine the complaint carefully". The Commission is not obliged to launch an official investigation even if companies complain about a rival\u2019s business practices. For more related CIO coverage, read Microsoft Responds to EC Complaints, Judge Blasts Microsoft\u2019s Antitrust \u2019Footdragging\u2019 and EC Denies 2nd Microsoft Deadline Extension.Don\u2019t forget to keep checking in at our CIO News Alerts page for updated news coverage.