Commerce One Announces New XML Technology to Accelerate Deployment of B2B E-Commerce.

Business Editors &High Tech Writers

WALNUT CREEK, Calif.--(BUSINESS WIRE)--Jan. 24, 2000

World's First Object-Oriented, Schema-based XML Transaction

Engine Now Available

Commerce One, Inc. (NASDAQ: CMRC), the leader in global e-commerce solutions for business, today introduced a set of revolutionary new XML technology tools delivered with Commerce One's MarketSite Portal Solution 3.0.

This robust technology enables the rapid development and deployment of open XML-based portals, trading communities, applications, and documents. XML technology enables trading partners to easily transact across dissimilar applications, systems, software, and documents.

&uot;As a turn-key portal solution leveraging the world's first object-oriented, schema-based XML technology, Commerce One MarketSite Portal Solution 3.0 enables companies to quickly build business-to-business e-commerce portals,&uot; said Chuck Donchess, vice president of marketing and business development, Commerce One.

Commerce One's XML technology and tools are ideal for trading partners and Internet market makers who want to accelerate trading through B2B e-commerce. The new XML-based transaction platform enables heterogeneous systems to communicate and allows different portals to interoperate and connect to the Commerce One Global Trading Web(TM). This comprehensive set of schema-based XML tools includes:

-       Commerce One XML Commerce Connector (XCC), provides all the
        components necessary for trading partners to integrate with
        Commerce One MarketSite. XCC includes a robust set of tools to
        enable the creation, transmission, routing and processing of
        XML-based documents.

-       Schema for Object-Oriented XML (SOX), Commerce One's default
        XML schema language is used by MarketSite to define business
        documents.

-       XML Common Business Library (xCBL) 2.0, a set of XML-based
        building blocks and a document framework that helps developers
        create business documents in Microsoft's XDR schema language
        and Commerce One's SOX.

-       An initial set of 11 pre-defined XML-based business documents,
        such as purchase orders, invoices and product catalogs built
        using xCBL.

-       Commerce One XML Development Kit Pro (XDK Pro), the ideal
        toolkit for building robust, extendable, document-based
        e-commerce applications. By applying a Java-based programming
        model to XML documents, XDK Pro makes programming schema-based
        XML applications easier, safer, and more efficient.

&uot;NECX is excited to utilize leading XML technology by leveraging Commerce One's xCBL building blocks for procurement services,&uot; said Jim Sylvester, Manager, Business Development, NECX Direct, LLC. &uot;As xCBL becomes the industry standard, our investment in this technology will enable our company to support buyer clients in their efforts to reduce procurement costs.&uot;

Commerce One's XML technology and tools are included in MarketSite Portal Solution 3.0. In addition, xCBL and SOX may be downloaded free of charge at www.commerceone.com.

About Commerce One

Commerce One (NASDAQ: CMRC) is the leader in global e-commerce solutions for business. Through its products, portals, and services, Commerce One creates access to worldwide markets, allowing anyone to buy from anyone, anytime, anywhere. The Commerce One Global Trading Web(TM) is the world's largest business-to-business trading community. Comprised of many open e-marketplaces, the Global Trading Web provides unprecedented economies of scale for buying organizations, suppliers, and service providers worldwide. Commerce One is located in Walnut Creek, Calif., and can be reached by phone at 1-800/308-3838 or 925/941-6000 or via the Internet at http://www.commerceone.com/.

Forward Looking Statements

Certain statements made in this press release by Commerce One are not historical facts but are &uot;forward looking statements&uot; and may involve risks and uncertainties which could cause actual future results to differ materially and adversely from those anticipated by such statements. Included among the factors that could affect Commerce One's performance are: general economic conditions; fluctuations in operating results; its ability to effectively manage future growth, to retain and efficiently integrate our executive management team, and to identify, hire, train and retain, in a highly competitive market, individuals highly skilled in the Internet and its rapidly changing technology; significant revenue concentration in a limited number of clients; the lack of long-term contracts; its ability to enter into, and retain its existing, strategic relationships; market acceptance, rapid technological change, a decline in Internet usage, and intense competition in its market; its ability to effectively integrate the operational, managerial and financial aspects of future acquisitions; Year 2000 issues including those affecting Commerce One and its clients; and its ability to obtain financing when required. For a discussion of these and other risk factors that could affect Commerce One's business, see &uot;Risk Factors&uot; in Commerce One's filings with the Securities and Exchange Commission, including its quarterly report on Form 10-Q for the quarter ended September 30, 1999.

Note to Editors: Commerce One, Many Markets. One Source., Global Trading Web, BuySite, MarketSite, Global Trading Platform, Common Business Library, XML Development Kit, XML Commerce Connector, MarketView, and SupplyOrder are either trademarks or registered trademarks of Commerce One, Inc. All other company, product, and brand names are trademarks of their respective owners.