Mentor Graphics Announces Status as a Spatial CAA V5 Adopter

WILSONVILLE, Ore., May 18, 2004 - Mentor Graphics Corporation (Nasdaq: MENT) today announced that it has joined the Spatial CAA V5 Adopter Program within its harness systems division (HSD).  Spatial Corp is a subsidiary of Dassault Syst?mes.

This agreement between Spatial Corp. and Mentor Graphics means that they will be able to offer customers new software that will facilitate bi-directional data exchange between HSD's electrical design software and Dassault Syst?mes' CATIA V5 mechanical CAD (MCAD) solution.  Several Mentor Graphics customers are migrating to Dassault Syst?mes' Component Application Architecture Version 5 (CAA V5) platform, so the software developed under this agreement will provide users with improved integration between their mechanical and electrical systems design environments.  Mentor Graphics recently announced the Capital? Harness Systems^TM (CHS) release 3, covering an extensive portion of the electrical design and harness engineering flow.  This agreement will result in much closer integration between the CHS tool and CATIA V5. 

"In order to design and manufacture the electrical architecture of today's electromechnical systems, companies have to create a design flow that enables collaboration between multiple and diverse design teams," said Martin O'Brien, general manager, harness systems division, Mentor Graphics.  "Being a Spatial CAA V5 Adopter allows us to embed the CATIA V5 development environment into Mentor facilities and provides the support needed to ensure that first class products emerge to facilitate excellent interoperability between Mentor tools and CATIA V5 applications." 

"Having the opportunity to welcome Mentor Graphics as a Spatial CAA V5 Adopter reinforces the value of Spatial's position with CAA V5," said Keith Mountain, president and chief operating officer, Spatial.  "We are pleased to be working with Mentor Graphics and have no doubt their products will also add value to Dassault Syst?mes PLM solutions portfolio."

About Mentor Graphics
Mentor Graphics Corporation is a world leader in electronic hardware and software design solutions, providing products, consulting services and award-winning support for the world's most successful electronics and semiconductor companies.  Established in 1981, the company reported revenues over the last 12 months of about $675 million and employs approximately 3,700 people worldwide.  Corporate headquarters are located at 8005 S.W. Boeckman Road, Wilsonville, Oregon 97070-7777; Silicon Valley headquarters are located at 1001 Ridder Park Drive, San Jose, California 95131-2314. World Wide Web site: http://www.mentor.com/.

Mentor Graphics and Capital are registered trademarks and Capital Harness Systems is a trademark of Mentor Graphics.  All other company or product names are the registered trademarks or trademarks of their respective owners.

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For more information, please contact:
James Price Mentor Graphics 011.44.161.926.1637 james_price@mentor.com	Suzanne Graham Mentor Graphics 503.685.7789 suzanne_graham@mentor.com