V5 Solutions will cover electrical engineering complementing
Dassault Systèmes' PLM offering from early system design to manufacturing

Seattle, USA and Paris, France – September 30, 2003 – Dassault Systèmes (NASDAQ: DASTY; Euronext Paris: #13065, DSY.PA) and IGE+XAO (Euronext Paris, NextEconomy FR0000030827 FTSE 977) today announced the signing of a strategic development agreement under which IGE+XAO as a Gold Software Partner will develop, market and sell CAA V5 Based applications for electrical modeling (functional, topology and logical) and electrical diagrams generation. Through this partnership, IGE+XAO will complement the existing Dassault Systèmes' V5 electrical PLM solutions.

Dassault Systèmes' V5 electrical PLM solutions define the implementation of wire harness in the 3D digital mock-up taking into account both spatial installation constraints and electrical functional specifications. Design automation of wiring systems in CATIA® V5 Electrical Wire Routing allows users to capture corporate know-how for the routing process. Associative 2D drawings for inspection and documentation purposes are automatically generated with CATIA V5 Electrical Harness Flattening. Furthermore, DELMIA™ V5 brings to users all the capabilities to define and simulate all processes and resources needed to manufacture the harness on the form board.

Thanks to this partnership, IGE+XAO, a leader in electrical schematic software development, will complement Dassault Systèmes offering by developing a suite of products on top of the CAA V5 architecture. IGE+XAO will first focus on delivering V5 applications for electrical modeling and generative electrical diagrams. The IGE+XAO CAA V5 based product portfolio will include Functional System Design, System Diagram, Electrical Topology, and Generative Electrical Views for maintenance/design review and certification. These Solutions will provide users with highly interactive capabilities for authoring and reviewing their electrical functional and logical product model. The complete lifecycle of this product model is managed by ENOVIA™ engineering and manufacturing hubs thanks to a unique data model.

For the first time on the market, Electrical cabling and transportation manufacturers, mainly automotive and aerospace companies, will have a comprehensive solution covering electrical engineering, from early requirements, system design to manufacturing. The solution will support international standards and regulations facilitating customer reuse of existing product design. With this unique approach, V5 users will be able to evaluate modification impacts through "what if" scenarios simulations from functional to manufacturing. The result is faster product development, fewer errors, and drastically shorter development cycles.

"Through this partnership, IGE+XAO and Dassault Systèmes reinforce their leadership in electrical PLM solutions," said Alain Di Crescenzo President IGE+XAO. "Today's announcement is a major business and technological step for our company: we will offer seamless integration with the portfolio of Dassault Systèmes, the worldwide leader in the PLM market."

"IGE+XAO and Dassault Systèmes are leveraging their respective strengths to dramatically grow their presence in the electrical engineering market," said Dominique Florack executive vice president, Research and Development, Dassault Systèmes. " IGE+XAO's commitment is a milestone toward the achievement of Dassault Systèmes V5 Systems PLM Solutions strategy, consistent with Dassault Systèmes' and its strategic partners' V5 solutions."

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About the CAA V5 Software Community Program
CAA V5 (Component Application Architecture) is Dassault Systèmes' open middleware and development environment for PLM.
The CAA V5 Software Community Program is dedicated to ISV (Independent Software Vendors) willing to develop, sell and support CAA V5-based applications, fully integrated with CATIA, ENOVIA and DELMIA V5. This collaboration results in the expansion of Dassault Systèmes' PLM solutions to cover the entire product lifecycle range, thus enabling mutual customers to take advantage of a larger set of products in response to their specific industrial needs. By delivering best-in-class complementary V5 applications, CAA V5 Gold Software Partners further promote Dassault Systèmes' objective of supporting and continuously improving customer processes. Gold Partners also benefit from a unique and privileged access to Dassault Systèmes' R&D laboratory and advanced technical and marketing support. Spatial Corp. is the primary channel for marketing, sales and support/services for CAA V5.
For more information refer to http://www.caav5.com.

About IGE+XAO
For over 16 years, the IGE+XAO Group has been a software Editor conceiving, producing, selling and ensuring the maintenance of a range of Computer Aided Design software (called "CAD"). These CAD software products have been conceived to help manufacturers in the design and maintenance of the electrical part of production processes. This type of CAD is called "Electrical CAD". IGE+XAO has built a range of Electrical and Systems CAD software designed for all the manufacturers, which functions either with an independent computer or with a company network. With more than 41 000 seats throughout the world, IGE+XAO is a reference in its domain. For more information, visit http://www.ige-xao.com

About Dassault Systèmes
As world leader in three-dimensional product lifecycle management (PLM) solutions, the Dassault Systemes group brings value to more than 65,000 customers in 80 countries. A pioneer in the 3D software market since 1981, Dassault Systemes develops and markets PLM application software and services that support industrial processes and provide a 3D vision of the entire life cycle of products from conception to retirement. Its offering includes PLM integrated solutions for product development (CATIA, ENOVIA, DELMIA, SMARTEAM), general-use 3D solutions (SolidWorks), and 3D components (SPATIAL). Dassault Systemes is listed on the Nasdaq (DASTY) and Euronext Paris (#13065, DSY.PA) stock exchanges. Information about Dassault Systemes is available at http://www.3ds.com.