Commerce One Releases Open Source, Royalty Free DocSOAP XML Developer Kit for Document Style SOAP.

Business Editors/High-Tech Writers

PLEASANTON, Calif.--(BUSINESS WIRE)--April 29, 2003

Commerce One (Nasdaq:CMRC)

DocSOAP XML Developer Kit Designed to Increase Use and Adoption of

Web Services in Business; Provides Better Performance and More

Complete Standards Support Than Other Solutions

Commerce One (Nasdaq:CMRC) today announced that it has posted an Open Source, royalty free Web services and SOAP XML Development Kit as part of its ongoing drive to foster the adoption of Web services technology for business. The DocSOAP XML Development Kit (DocSOAP XDK) is designed to provide developers and businesses with advanced XML and SOAP tools to take advantage of Web services technology, particularly when used to handle the large business documents associated with e-commerce integration and the development of composite applications.

One of the major predicted uses for SOAP is the integration of businesses, systems and partners. This requires efficient handling of potentially large XML and non-XML documents. The DocSOAP XDK is designed specifically to address this type of problem. In initial tests conducted by Commerce One, the DocSOAP XDK processed large-sized XML documents up to twice as fast and using less memory than other available SOAP toolkits.

The DocSOAP XDK includes:

-- "UNIParser," an XML compiler that parses and validates XML

documents and checks for compliance with their XML schema;

-- "Xgen," an XML Java bean generator that generates Java beans 

to make it easier for Java programmers to manipulate XML

documents without understanding XML;

-- "Document Framework APIs" that facilitate the efficient

manipulation of XML documents through DOM, SAX and Bean

interfaces. Efficient support for non-XML documents is also

provided;

-- "DocSOAP Framework APIs" that can generate and process SOAP

messages that conform to SOAP versions 1.1 and 1.2, SOAP with

Attachments and DIME.

To optimize developer flexibility and choice, the UNIParser XML parser and the Xgen bean generator provide more complete support for XML schema than other Java schema compilers, allowing developers to more fully exploit the features of XML schema. The DocSOAP XDK can be downloaded by developers from the Commerce One developer's Web site: http://www.commerceone.com/developers/docsoapxdk/.

The DocSOAP XDK is used by the Commerce One Conductor(TM) platform, the industry's first standards-based composite application platform. Unlike many initial Open Source offerings, the code has already undergone rigorous development and testing during the development of Commerce One Conductor. To assure that the technology retains its leading-edge position and standards focus, Commerce One is committing resources to the on-going development and enhancement of the DocSOAP XDK in the Open Source community. Activities are planned to provide support for the WS-I Basic Profile 1.0 and the final version of the SOAP 1.2 specification as these standards mature.

"Commerce One has always maintained a commitment to the creation and extension of flexible, standards-based and cross-enterprise technologies. Our Commerce One Conductor platform is a statement to the market about the benefits of leveraging standards and Web services technology," said Mark Hoffman, chairman and CEO of Commerce One. "With this DocSOAP XDK, we are making the added commitment to provide advanced tools, supporting Web services, SOAP and XML to the widest possible audience of developers who can benefit most from them."

About Commerce One

From its initial roots in Internet-based software applications to its establishment of the world's largest e-commerce trading network, Commerce One has consistently been at the forefront of delivering advanced technologies that help global businesses collaborate with their partners, customers and suppliers over the Internet. Commerce One has defined many of the open standards and protocols established for business networks today and our global customer base represent leaders in a wide range of industries. Our newest Commerce One Conductor(TM) platform and supporting set of composite applications represent the next generation of collaborative solutions that help enterprises optimize their existing technology investments and enhance functionality of existing applications and processes. For more information, go to www.commerceone.com.

Forward Looking Statements

This press release includes forward-looking statements within the meaning of the securities laws. These forward-looking statements discuss the benefits of Commerce One's DocSOAP XML Development Kit, including faster and more efficient processing and manipulation of XML documents. The words "believe," "expect," "intend," "plan," "project," "will" and similar phrases as they relate to Commerce One are intended to identify such forward-looking statements. These statements reflect the current views and assumptions of Commerce One, and are subject to various risks and uncertainties that could cause actual results to differ materially from expectations. These factors include, without limitation, the possibility that the DocSOAP XML Development Kit may not meet user expectations, the acceptance in the market for this and other Commerce One products, technical or support issues relating to the DocSOAP XML Development Kit, potential intellectual property or other risks associated with the open source-based strategy of licensing the DocSOAP XML Development Kit, and various external factors, including economic conditions, which may impact the demand for Commerce One products and services or for Web services technology generally. For a discussion of these and other risk factors that could affect Commerce One's business, see "Risk Factors" in Commerce One's filings with the Securities and Exchange Commission, including its annual report on Form 10-K for the fiscal year ended December 31, 2002. The information provided in this press release is current as of the date of its publication. Commerce One expressly disclaims any obligation to release publicly any updates or revisions to any forward-looking statements to reflect any changes in expectations, or any change in events or circumstances on which those statements are based, unless otherwise required by law.

Commerce One and Commerce One Conductor are trademarks and/or registered trademarks of Commerce One Operations, Inc. All other company, product, and brand names are trademarks of their respective owners.