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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
the Registration Statement (Form S-3) 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
November 3, 2000
