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EXHIBIT 23.1
CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS
We consent to the reference to our firm under the caption "Experts"
in Amendment No. 1 to Form S-3 Registration Statement and related Prospectus
of Commerce One, Inc. for the registration of 367,993 shares of its common
stock and to the incorporation by reference therein of our report dated
January 21, 2000, with respect to the consolidated financial statements and
financial statement schedule of Commerce One, Inc. included in its Annual
Report (Form 10-K) for the year ended December 31, 1999, filed with the
Securities and Exchange Commission.
/s/ Ernst & Young LLP
Walnut Creek, California
December 13, 2000
