Document:

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                                                                   EXHIBIT 10.2

                                    STANDSTILL AND STOCK

                                    RESTRICTION AGREEMENT

                                        by and between

                                      COMMERCE ONE, INC.,

                                              and

                                            SAP AG

                                         JUNE 14, 2000

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                                       TABLE OF CONTENTS
                                       -----------------

                                                                           PAGE

<S>                                                                          <C>

ARTICLE I DEFINITIONS.........................................................1

ARTICLE II STANDSTILL OBLIGATIONS AND TRANSFER RESTRICTIONS...................5

    2.1 The Purchaser's Standstill Obligations................................5
    2.2 The Purchaser's Transfer Restrictions.................................6
    2.3 Company Notice to Purchaser...........................................8

ARTICLE III VOTING OBLIGATIONS................................................8
    3.1 The Purchaser's Voting Obligations....................................8

ARTICLE IV MISCELLANEOUS......................................................9

    4.1  Governing Law; Jurisdiction and Venue.................................9
    4.2  Survival.............................................................10
    4.3  Assignment...........................................................10
    4.4  Entire Agreement; Amendment..........................................10
    4.5  Notices, etc.........................................................10
    4.6  Delays or Omissions..................................................10
    4.7  Expenses.............................................................10
    4.8  Specific Performance.................................................10
    4.9  Stop Transfer Orders; Legends........................................11
    4.10 Further Assurances...................................................11
    4.11 Facsimile; Counterparts..............................................11
    4.12 Severability.........................................................11
    4.13 Interpretation.......................................................11
    4.14 Attorneys' Fees......................................................11

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                                                                 EXECUTION COPY

                    STANDSTILL AND STOCK RESTRICTION AGREEMENT

      This Standstill and Stock Restriction Agreement (hereinafter the
"Agreement") is made as of June 14, 2000 by and between Commerce One, Inc., a
Delaware corporation (the "Company") and SAP Aktiengesellschaft, a stock
corporation incorporated under the laws of the Federal Republic of Germany
(the "Purchaser").

      WHEREAS, the Company and Purchaser have executed that certain Share
Purchase Agreement pursuant to which Purchaser has agreed to purchase common
stock of the Company, dated as of even date herewith (the "Purchase
Agreement");

      WHEREAS, as a condition precedent to the Company entering into the
Purchase Agreement and completing the purchase contemplated therein,
simultaneously with entering into the Purchase Agreement, Purchaser is
entering in this Agreement;

      WHEREAS, the Company and Purchaser desire, in connection with the
execution of the Purchase Agreement, to make certain covenants and agreements
with one another pursuant to this Agreement;

      NOW THEREFORE, in consideration of the covenants and promises set forth
herein, and for other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties hereby agree as
follows:

                                   ARTICLE I
                                 DEFINITIONS

      For the purpose of this Agreement, the following terms shall have the
meanings specified with respect thereto below:

      "Affiliate" shall have the meaning set forth in Rule 12b-2 of the rules
and regulations promulgated under the Exchange Act; PROVIDED, HOWEVER, that
for purposes of this Agreement, the Purchaser and its Affiliates, on the one
hand, and the Company and its Affiliates, on the other, shall not be deemed
to be "Affiliates" of one another.

      "Beneficially Own," "Beneficially Owned," or "Beneficial Ownership"
shall have the meaning set forth in Rule 13d-3 of the rules and regulations
promulgated under the Exchange Act.

      "Board Approval" shall mean the affirmative vote of a majority of the
Disinterested Directors of the Company or a unanimous written consent of the
Board of Directors of the Company duly obtained in accordance with the
applicable provisions of the Company's certificate of incorporation, bylaws
and applicable law.

                                       -1-

<PAGE>

      "Change in Control of the Company" shall mean any of the following:
(i) a merger, consolidation or other business combination or transaction to
which the Company is a party if the stockholders of the Company immediately
prior to the effective date of such merger, consolidation or other business
combination or transaction, as a result of such share ownership, have
Beneficial Ownership of voting securities representing less than 50% of the
Total Current Voting Power of the surviving entity following such merger,
consolidation or other business combination or transaction; (ii) an
acquisition by any person, entity or 13D Group of direct or indirect
Beneficial Ownership of Voting Stock of the Company representing 50% or more
of the Total Current Voting Power of the Company; (iii) an acquisition by any
Competitor of direct or indirect Beneficial Ownership of Voting Stock of the
Company representing 25% or more of the Total Current Voting Power of the
Company; (iv) a sale of all or substantially all of the assets of the
Company; (v) a liquidation or dissolution of the Company; (vi) the
institution of any proceeding by or against the Company under the provisions
of any insolvency or bankruptcy law which is not dismissed within ninety (90)
days, the appointment of a receiver of a material portion of the assets or
property of the Company, or the issuance of an order for an execution on a
material portion of the property of the Company pursuant to a judgment which
is not dismissed within ninety (90) days; or (vii) during any period of two
consecutive years, individuals who at the beginning of such period
constituted the Board of Directors of the Company (together with any new
directors whose election by such Board of Directors or whose nomination for
election by the stockholders of the Company was approved by a vote of a
majority of the directors of the Company then still in office who were either
directors at the beginning of such period or whose election or nomination for
election was previously so approved, other than a director designated by a
person who has entered into an agreement with the Company to effect a
transaction described in the preceding clauses) cease for any reason to
constitute a majority of the Board of Directors of the Company then in
office.

      "Company Common Stock" shall mean shares of the Common Stock of the
Company.

      "Competitor" shall mean (a) Oracle Corporation, International Business
Machines Corporation, i2 Technologies, Inc., Peoplesoft, Inc., Baan Company,
N.V., Siebel Systems, Inc. and Ariba Inc. and their successors, (b) any
person in which any of the persons set forth in clause (a) own more than
twenty percent (20%) of the Total Current Voting Power of such person or (c)
any person with which any of the persons set forth in clause (a) have a
strategic alliance or similar agreement that provides for the joint offering
of a solution that substantially competes with a solution offered by
SAPMarkets, Inc. or its Affiliates.

      "Competitor Offer" shall mean (a) a bona fide public tender offer
subject to the provisions of Regulation 14D of the rules and regulations
promulgated under the Exchange Act made by a  Competitor when first commenced
within the meaning of Rule 14d-2(a) of the rules and regulations promulgated
under the Exchange Act, by a person or 13D Group (which is not made by and
does not include the Purchaser or any Affiliate of the Purchaser) to purchase
or exchange for cash or other consideration any Voting Stock and which
consists of an offer that, if consummated, would result in the Competitor
acquiring Beneficial Ownership of Voting Stock of the Company representing
more than 25% of the Total Current Voting Power of the Company or (b) the
execution of a definitive agreement between the Company and a Competitor that
provides for the Competitor acquiring

                                       -2-

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Beneficial Ownership of Voting Stock of the Company representing more than
25% of the Total Current Voting Power of the Company.

      "Control" or "Controlled by" shall have the meaning set forth in Rule
12b-2 of the rules and regulations promulgated under the Exchange Act.

      "Disinterested Director" means a member of the Board of Directors of
the Company who is not (i) an employee or consultant of Purchaser or any of
its Affiliates; (ii) a member of the Board of Directors of Purchaser or any
of its Affiliates; or (iii) the holder of more than three percent (3%) of the
voting stock of Purchaser or any of its Affiliates.

      "Exchange Act" shall mean the Securities Exchange Act of 1934, as amended.

      "Non-Voting Convertible Securities" shall mean any securities of the
Company which are convertible into, exchangeable for or otherwise exercisable
to acquire Voting Stock of the Company, including convertible securities,
warrants, rights or options to purchase Voting Stock of the Company.

      "Opposed Tender Offer" shall mean a Third Party Tender Offer pursuant
to which the Board of Directors of the Company has publicly published, sent
or given to security holders of the Company a statement disclosing that the
Company recommends rejection of the Third Party Tender Offer pursuant to Rule
14e-2 of the rules and regulations promulgated under the Exchange Act.

      "person" shall mean an individual, corporation, partnership, limited
liability company, association, trust, or other entity or organization,
including a government or political subdivision or an agency or
instrumentality thereof.

      "Purchaser Controlled Entity" shall mean an entity of which the
Purchaser collectively owns not less than a majority of the outstanding
voting power entitled to vote in the election of directors of such entity
(or, in the event the entity is not a corporation, the governing members,
board or other similar body of such entity).

      "Rule 144" shall mean Rule 144 as promulgated under the Securities Act.

      "SEC" shall mean the U.S. Securities and Exchange Commission.

      "Securities Act" shall mean the Securities Act of 1933, as amended.

      "Shares" shall mean the shares of Company Common Stock sold to
Purchaser pursuant to the Purchase Agreement (and all securities of Company
issued with respect to such shares pursuant to the reorganization of the
Company into a holding company structure, stock splits, stock dividends and
similar events).

      "Standstill Limit" shall mean 10% of the Total Current Voting Power of
the Company.

                                       -3-

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      "Standstill Period" shall mean the period beginning on the date hereof
and ending on the occurrence of a Standstill Termination Event.

      "Standstill Reinstatement Event" shall mean the occurrence of the
withdrawal or termination (including, without limitation, as a result of a
temporary restraining order or an injunction issued by a governmental entity)
of a Competitor Offer prior to the third anniversary of the date of this
Agreement.

      "Standstill Revised Limit" shall mean the percentage of the Total
Voting Current Voting Power of the Company represented by all Voting Stock
held by Purchaser as of the occurrence of a Standstill Reinstatement Event.

      "Standstill Termination Event" shall mean the earliest to occur of the
following:  (i) a Change in Control of the Company (other than a Change in
Control of the Company involving the Purchaser or any Affiliate of the
Purchaser or a 13D Group of which Purchaser or any Affiliate of Purchaser is
a member), (ii) a Strategic Alliance Agreement Termination; (iii) the third
anniversary of the date of this Agreement; or (iv) a Competitor Offer,
PROVIDED, HOWEVER, that upon a Standstill Reinstatement Event, the Standstill
Termination Event shall not be deemed to have occurred and the Standstill
Period shall be deemed to be reinstated and, PROVIDED, FURTHER, that if the
Standstill Revised Limit is greater than the Standstill Limit, then the
Standstill Revised Limit and not the Standstill Limit shall thereafter be
deemed the Standstill Limit for all purposes hereunder.

      "Strategic Alliance Agreement" shall mean the strategic alliance
agreement contemplated among the Company, Purchaser and SAPMarkets, Inc.

      "Strategic Alliance Agreement Termination" shall mean a termination of
the Strategic Alliance Agreement in accordance with its terms, other than a
termination by the Company due to a material breach of the Technology
Agreement by Purchaser as provided for in the Strategic Alliance Agreement;
PROVIDED, HOWEVER, if the Strategic Alliance Agreement is not entered into
with one (1) year of the date hereof, a "Strategic Alliance Agreement
Termination" shall mean the first anniversary of the date of this Agreement.

      "Third Party Tender Offer" shall mean a bona fide public tender offer
subject to the provisions of Regulation 14D of the rules and regulations
promulgated under the Exchange Act when first commenced within the meaning of
Rule 14d-2(a) of the rules and regulations promulgated under the Exchange
Act, by a person or 13D Group (which is not made by and does not include any
of the Company, the Purchaser or any Affiliate of the Purchaser) to purchase
or exchange for cash or other consideration any Voting Stock and which
consists of an offer to acquire more than 50% of the Total Current Voting
Power of the Company.

      "Total Current Voting Power" shall mean, with respect to any entity, at
the time of determination of Total Current Voting Power, the total number of
votes which may be cast in the election of members of the board of directors
of the corporation if all securities entitled to vote in the election of such
directors are present and voted (or, in the event the entity is not a
corporation, the governing members, board or other similar body of such
entity).

                                       -4-

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      "Transfer" shall have the meaning ascribed to it in SECTION 2.2 hereof.

      "Transfer Restriction Termination Date" shall mean the earlier of (i) a
Strategic Alliance Agreement Termination, or (ii) the second anniversary of
the date of this Agreement.

      "Voting Stock" shall mean shares of the Company Common Stock and any
other securities of the Company having the ordinary power to vote in the
election of members of the Board of Directors of the Company.

      "Written Approval" shall mean receipt of a certificate signed by the
Chief Executive Officer or Secretary of the Company providing consent to the
matter for which Written Approval is required.

      "13D Group" means any group of persons formed for the purpose of
acquiring, holding, voting or disposing of Voting Stock which would be
required under Section 13(d) of the Exchange Act, and the rules and
regulations promulgated thereunder, to file a statement on Schedule 13D
pursuant to Rule 13d-1(a) of the rules and regulations promulgated under the
Exchange Act or a Schedule 13G of the rules and regulations promulgated under
the Exchange Act pursuant to Rule 13d-1(c) of the rules and regulations
promulgated under the Exchange Act with the SEC as a "person" within the
meaning of Section 13(d)(3) of the Exchange Act if such group Beneficially
Owned Voting Stock representing more than 5% of any class of Voting Stock
then outstanding.

                                   ARTICLE II
                   STANDSTILL OBLIGATIONS AND TRANSFER RESTRICTIONS

      2.1 THE PURCHASER'S STANDSTILL OBLIGATIONS.

            (a) During the Standstill Period, none of Purchaser, any
Affiliate of Purchaser or any 13D Group of which Purchaser or any of its
Affiliates is a member shall, without first obtaining Written Approval,
directly or indirectly, acquire or Beneficially Own Voting Stock or authorize
or make a tender offer, exchange offer or other offer to acquire Voting
Stock, if the effect of such acquisition would be to increase the percentage
of Total Current Voting Power of the Company represented by all Voting Stock
Beneficially Owned by Purchaser and its Affiliates (and any 13D Group to
which Purchaser and its Affiliates is a party) to more than the Standstill
Limit.

            (b) Purchaser shall not be deemed to have violated its covenants
under this SECTION 2.1 solely by virtue of (and only to the extent of) any
increase in the aggregate percentage of the Total Current Voting Power of the
Company represented by Voting Stock Beneficially Owned by Purchaser or its
Affiliates if such increase is the result of a recapitalization of the
Company, a repurchase of securities by the Company or other actions taken by
the Company or any of the Company's Affiliates that have the effect of
reducing the Total Current Voting Power of the Company.

            (c) During the Standstill Period, Purchaser shall promptly (and
in no case later than 5 business days of such event) notify the Company if
the aggregate Beneficial Ownership of Voting Stock of Purchaser and its
Affiliates (and any 13D Group to which Purchaser and its Affiliates is a

                                       -5-

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party) exceeds the aggregate Beneficial Ownership of Voting Stock specified
in Purchaser's most recent prior notice to the Company under this SECTION
2.1(c) (or if no such notice has yet been given, the aggregate Beneficial
Ownership of Voting Stock purchased pursuant to the Purchase Agreement) by
more than 1% of the outstanding Voting Stock.  Such notice shall specify the
amount of Voting Stock Beneficially Owned by Purchaser and its Affiliates
(and any 13D Group to which Purchaser and its Affiliates is a party) as of
the date of the notice.  Notwithstanding any provision of this SECTION 2.1(c)
to the contrary, the provisions of this SECTION 2.1(c) requiring notice to
the Company may be satisfied by the delivery by Purchaser to the Company of
any Schedule 13D or Schedule 13G filed by Purchaser with respect to the
Voting Stock (or any amendment thereto).

            (d) During the Standstill Period, Purchaser and its Affiliates
shall not, without first obtaining Written Approval, solicit or participate
in any solicitation of proxies with respect to any Voting Stock, nor shall
they seek to advise or influence any person with respect to the voting of any
Voting Stock (other than as otherwise provided or contemplated by this
Agreement).

            (e) During the Standstill Period, Purchaser shall not, without
first obtaining Written Approval, deposit any Voting Stock in a voting trust
or, except as otherwise provided or contemplated herein, subject any Voting
Stock to any arrangement or agreement with any third party with respect to
the voting of such Voting Stock.

            (f) During the Standstill Period, Purchaser shall not, without
first obtaining Written Approval, join a 13D Group (other than a group
comprising solely Purchaser and its Affiliates) or other group, or otherwise
act in concert with any third person for the purpose of acquiring, holding,
voting or disposing of Voting Stock or Non-Voting Convertible Securities.

            (g) During the Standstill Period, Purchaser shall not, without
first obtaining a Written Approval, otherwise act, alone or in concert with
others, to seek control or influence the management, Board of Directors or
policies of the Company.

      2.2 THE PURCHASER'S TRANSFER RESTRICTIONS.

            (a) Until the Transfer Restriction Termination Date, Purchaser
shall not, directly or indirectly, sell, transfer, pledge, contract to sell,
sell any option or contract to purchase, purchase any option or contract to
sell, grant any option, right or warrant to purchase, transfer the economic
risk of ownership of, or otherwise dispose of (each, a "Transfer"), any
Shares except:

                  (i) to the Company;

                  (ii) to a Purchaser Controlled Entity so long as such
Purchaser Controlled Entity agrees, by executing a counterpart to this
Agreement, to (A) hold such Shares subject to all of the provisions of this
Agreement as if it were the Purchaser, and (B) promptly transfer such Shares
to Purchaser or another Purchaser Controlled Entity if, prior to the Transfer
Restriction Termination Date, it ceases to be a Purchaser Controlled Entity;

                                          -6-

<PAGE>

                  (iii) in response to a bona fide public tender offer or
exchange offer subject to Regulation 14D or Rule 13e-3 of the rules and
regulations promulgated under the Exchange Act for cash or other
consideration which is made by or on behalf of the Company;

                  (iv) in response to a Third Party Tender Offer with
respect to which the Board of Directors of the Company shall have recommended
to the stockholders of the Company that they accept such offer pursuant to
Rule 14d-9 of the rules and regulations promulgated under the Exchange Act;

                  (v) in response to an Opposed Tender Offer, PROVIDED,
HOWEVER, that Purchaser's tender of shares into such Opposed Tender Offer is
expressly conditioned upon receipt by the person making such Opposed Tender
Offer of valid tenders which are not revoked or withdrawn as of the
"scheduled expiration date" (as set forth in Item 1004(a)(1)(iii) of
Regulation M-A of the rules and regulations promulgated under the Exchange
Act (or any extension of such scheduled expiration or the expiration of any
"subsequent offering period" as set forth in Rule 14d-11 of the rules and
regulations promulgated under the Exchange Act, as the case may be) of shares
of Voting Stock representing at least fifty-one percent (51%) of the Total
Current Voting Power of the Company by persons other than the Purchaser, its
Affiliates and any 13D Group of which Purchaser or any of its Affiliates is
party.

                  (vi) in connection with a Change in Control of the Company
which has received Board Approval.

                  (vii) After July 1, 2001, in a Transfer which (A) when
taken together with all prior sales of Shares by Purchaser and its Affiliates
does not exceed twenty percent (20%) of the total number of shares initially
sold to Purchaser pursuant to the Purchase Agreement (as adjusted for
reorganizations, stock splits, stock dividends, and similar events); (B) is
made in compliance with Rule 144 of the rules and regulations promulgated
under the Securities Act or pursuant to a private placement in which the
Company has received an opinion of counsel reasonably acceptable to the
Company that an exemption from registration is available; and (C) is made
without public disclosure other than as may be required pursuant to Rule 144
of the rules and regulations promulgated under the Securities Act, pursuant
to disclosure requirements of Section 13(d) of the Exchange Act and the rules
and regulations promulgated thereunder, or under other applicable law, in
each case solely to the minimum extent required under such rule, regulation
or law.  Notwithstanding anything to the contrary contained in this
subparagraph, (x) Purchaser shall not, prior to the Transfer Restriction
Termination Date, without first obtaining Written Approval, Transfer Shares
to any person or 13D Group of which Purchaser has knowledge, after due
investigation, will hold (including the Shares to be received in the
transfer) more than ten percent (10%) (other than through resales on the open
market through unsolicited broker's transactions or through transactions
directly with a market maker in which the market maker is not soliciting
purchasers of the shares on behalf of  the Purchaser, its Affiliates, or any
13G Group of which Purchaser or any Affiliate of Purchaser is a party) of the
Current Voting Power of the Company; (y) Purchaser shall not Transfer more
than five percent (5%) of the total number of shares initially sold to
Purchaser pursuant to the Purchase Agreement (as adjusted for
reorganizations, stock splits,

                                       -7-

<PAGE>

stock dividends and similar events) in any single five (5) trading day
period, and (z) Purchaser shall not Transfer more than two percent (2%) of
the total number of shares initially sold to Purchaser pursuant to the
Purchase Agreement (as adjusted for reorganizations, stock splits, stock
dividends and similar events) in any single trading day.

            (b) During the pendency of a Competitor Offer, the restrictions
on Transfer set forth in SECTION 2.2(a) hereof shall be suspended.

            (c) Any attempted sale, transfer or other disposition of Shares
by a Purchaser, a Purchaser Controlled Entity or any other person that is a
party to this Agreement that is not in compliance with this SECTION 2.2,
shall be null and void ab initio.

      2.3 COMPANY NOTICE TO PURCHASER.  In the event that, during the
Standstill Period, the Company's Board of Directors resolves to seek a
potential acquiror of the Company, and directs the Company's executive
officers to seek offers from multiple (three or more) potential acquirors,
the Company shall within five (5) days of such resolution give notice of the
Company's intention to seek offers for the acquisition of the Company.

                                  ARTICLE III
                             VOTING OBLIGATIONS

      3.1 THE PURCHASER'S VOTING OBLIGATIONS.

            (a) During the Standstill Period, Purchaser shall take such
action as may be required so that all Shares Beneficially Owned by Purchaser
or any Purchaser Controlled Corporation (and shall use commercially
reasonable efforts to cause any Shares held by an Affiliate of Purchaser or
any 13D Group of which Purchaser or any Affiliate of Purchaser is a party)
are voted for or cast or cause to be voted or cast in the same manner and
proportion as the votes cast by the holders of the Voting Securities other
than Purchaser or any Affiliate of Purchaser (or any 13D Group of which
Purchaser or any Affiliate of Purchaser is a party).

      (b) During the Standstill Period, Purchaser, as the holder of shares of
Voting Stock, shall be present, in person or by proxy, (and shall cause any
Purchaser Controlled Corporations holding Voting Stock to be so present and
shall use reasonable efforts to cause its Affiliates holding Voting Stock to
be so present) at all meetings of stockholders of the Company so that all
shares of Voting Stock and any Purchaser Controlled Corporation may be
counted for purposes of determining the presence of a quorum at such meetings.

      (c) During the Standstill Period, Purchaser agrees not to exercise (and
to cause any Purchaser Controlled Corporation not to exercise and to use
commercially reasonable efforts to cause any Affiliate of Purchaser and any
13D Group of which Purchaser or any Affiliate of Purchaser is a party not to
exercise) dissenter's rights, if any, that it may have with respect to the
Shares under applicable law in connection with any merger, consolidation or
other reorganization which is approved by the Company's Board of Directors
and if such transaction is a pooling-of-interests transaction, Purchaser
hereby covenants to enter (and to cause any Purchaser Controlled

                                       -8-

<PAGE>

Corporation to enter and to use commercially reasonable efforts to cause any
Affiliate of Purchaser and any 13D Group of which Purchaser or any Affiliate
of Purchaser is a party to enter) into a standard pooling affiliate lock-up
agreement if requested by the Company and if required to maintain
pooling-of-interests treatment with respect to such transaction (based upon
the recommendation of an independent accounting firm retained by either the
Company or the potential acquiror of the Company), regardless of the manner
in which Purchaser (or any Purchaser Controlled Corporation or any Affiliate
of Purchaser or any 13D Group of which Purchaser or any Affiliate of
Purchaser is a party) voted or cast Shares Owned by Purchaser with respect to
such transaction pursuant to paragraph (a) above.

                                   ARTICLE IV
                                 MISCELLANEOUS

      4.1 GOVERNING LAW; JURISDICTION AND VENUE.

            (a) This Agreement is to be construed in accordance with and
governed by the internal laws of the State of Delaware without giving effect
to any choice of law rule that would cause the application of the laws of any
jurisdiction other than the internal laws of the State of Delaware to the
rights and duties of the parties.

            (b) Any legal action or other legal proceeding relating to this
Agreement or the enforcement of any provision of this Agreement may be
brought or otherwise commenced in any state or federal court located in the
State of Delaware.  Each party to this Agreement:

                  (i) expressly and irrevocably consents and submits to the
jurisdiction of each state and federal court located in the State of Delaware
(and each appellate court located in the State of Delaware in connection with
any such legal proceeding, including to enforce any settlement, order or
award;

                  (ii) agrees that each state and federal court located in
the State of Delaware shall be deemed to be a convenient forum; and

                  (iii) waives and agrees not to assert (by way of motion, as
a defense or otherwise), in any such legal proceeding commenced in any state
or federal court located in the State of Delaware, any claim that such party
is not subject personally to the jurisdiction of such court, that such legal
proceeding has been brought in an inconvenient forum, that the venue of such
proceeding is improper or that this Agreement or the subject matter hereof or
thereof may not be enforced in or by such court.

            (c) Each party hereto agrees to the entry of an order to enforce
any resolution, settlement, order or award made pursuant to this SECTION 4.1
by the state and federal courts located in the State of Delaware and in
connection therewith hereby waives, and agrees not to assert by way of
motion, as a defense, or otherwise, any claim that such resolution,
settlement, order or award is inconsistent with or violative of the laws or
public policy of the laws of the State of Delaware or any other jurisdiction.

                                       -9-

<PAGE>

      4.2 SURVIVAL.  The representations, warranties, covenants and
agreements made herein shall survive any investigation made by Purchaser and
the closing of the transactions contemplated by the Purchase Agreement.

      4.3 ASSIGNMENT.  No party may assign either this Agreement or any of
its rights, interests, or obligations hereunder without the prior written
approval of the other parties; provided, however, that Purchaser may, without
the prior written approval of the Company, assign this Agreement and its
rights and obligations hereunder, in connection with a transfer of Shares as
provided in Section 2.2 hereof and Company may, without the prior written
approval of Purchaser, assign this Agreement and its rights and obligations
hereunder to a holding company in the event of the reorganization of Company
into a holding company structure.  Except as provided herein, any assignment
of rights or delegation of duties under this Agreement by a party without the
prior written consent of other parties shall be void ab initio.  Subject to
the preceding two sentences, this Agreement shall be binding upon and shall
inure to the benefit of the parties hereto and their respective successors
and permitted assigns.

      4.4 ENTIRE AGREEMENT; AMENDMENT.  This Agreement and the agreements
referred to herein constitute the full and entire understanding and agreement
between the parties with regard to the subject hereof, and no party shall be
liable or bound to any other party in any manner by any warranties,
representations or covenants except as specifically set forth herein and in
the agreements referred to herein.  Except as expressly provided herein,
neither this Agreement nor any term hereof may be amended, waived, discharged
or terminated other than by a written instrument signed by the party against
whom enforcement of any such amendment, waiver, discharge or termination is
sought.

      4.5 NOTICES, ETC.  All notices and other communications required or
permitted hereunder shall be made in the manner and to the addresses set
forth in the Purchase Agreement.

      4.6 DELAYS OR OMISSIONS.  Except as expressly provided herein, no delay
or omission to exercise any right, power or remedy accruing to a party under
this Agreement shall impair any such right, power or remedy nor shall it be
construed to be a waiver of any such breach or default, or an acquiescence
therein, or of or in any similar breach or default thereafter occurring; nor
shall any waiver of any single breach or default be deemed a waiver of any
other breach or default theretofore or thereafter occurring.

      4.7 EXPENSES.  Except as otherwise specifically provided herein, the
Company and Purchaser shall bear their own expenses incurred with respect to
this Agreement and the transactions contemplated hereby.

      4.8 SPECIFIC PERFORMANCE.  The parties hereto agree that irreparable
damage would occur in the event that any of the provisions of this Agreement
were not performed in accordance with their specific intent or were otherwise
breached.  It is accordingly agreed that the parties shall be entitled to an
injunction or injunctions, without bond, to prevent or cure breaches of the
provisions of this Agreement and to enforce specifically the terms and
provisions hereof, this being in addition to any other remedy to which they
may be entitled by law or equity, and any party sued for breach of this
Agreement expressly waives any defense that a remedy in damages would be
adequate.

                                      -10-

<PAGE>

      4.9 STOP TRANSFER ORDERS; LEGENDS.  The stock certificates representing
the Shares shall bear legends, and be subject to stop transfer orders as
provided in the Purchase Agreement.

      4.10 FURTHER ASSURANCES.  The parties hereto shall do and perform or
cause to be done and performed all such further acts and things and shall
execute and deliver all such other agreements, certificates, instruments or
documents as any other party may reasonably request from time to time in
order to carry out the intent and purposes of this Agreement and the
consummation of the transactions contemplated hereby.  Neither the Company
nor Purchaser shall voluntarily undertake any course of action inconsistent
with satisfaction of the requirements applicable to them set forth in this
Agreement and each shall promptly do all such acts and take all such measures
as may be appropriate to enable them to perform as early as practicable the
obligations herein and therein required to be performed by them.

      4.11 FACSIMILE; COUNTERPARTS.  This Agreement may be executed by
facsimile and in any number of counterparts, each of which may be executed by
fewer than all of the parties, each of which shall be enforceable against the
parties actually executing such counterparts, and all of which together shall
constitute one instrument.

      4.12 SEVERABILITY.  In the event that any provision of this Agreement
becomes or is declared by a court of competent jurisdiction to be illegal,
unenforceable or void, this Agreement shall continue in full force and effect
without said provision; PROVIDED, that no such severability shall be
effective if it materially changes the economic impact of this Agreement on
any party.

      4.13 INTERPRETATION.

            (a) The various section headings are inserted for purposes of
reference only and shall not affect the meaning or interpretation of this
Agreement or any provision hereof. The definitions contained in this
Agreement are applicable to the singular as well as the plural forms of such
terms and to the masculine as well as to the feminine and neuter genders of
such terms.

            (b) Each party hereto acknowledges that it has been represented
by competent counsel and participated in the drafting of this Agreement, and
agrees that any applicable rule of construction to the effect that
ambiguities are to be resolved against the drafting party shall not be
applied in connection with the construction or interpretation of this
Agreement.

            (c) When a reference is made in this Agreement to a Section,
Exhibit or Schedule, such reference shall be to a Section of, Exhibit to or
Schedule to this Agreement unless otherwise indicated.

      4.14 ATTORNEYS' FEES.  In any action at law or suit in equity in
relation to this Agreement, the prevailing party in such action or suit shall
be entitled to receive a reasonable sum for its attorneys' fees and all other
reasonable costs and expenses incurred in such action or suit.

                 [THE REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK]

                                      -11-

<PAGE>

            IN WITNESS WHEREOF, the parties hereto have executed this
Agreement as of the day and year first above written.

                                   COMMERCE ONE, INC.

                                   By:           /s/ Robert. M. Tarkoff
                                      ----------------------------------------
                                       Name:   Robert M. Tarkoff
                                       Title:  Senior Vice President, Corporate
                                               Development and General Counsel

                                   SAP AG

                                   By:         /s/ Prof. Dr. Henning Kagermann
                                      ----------------------------------------
                                       Name:  Prof. Dr. Henning Kagermann
                                       Title: Member of the Executive Board

                                   By:   /s/ Werner Sinzig
                                      ----------------------------------------
                                       Name:  Werner Sinzig
                                       Title: Prokurist

                     [STANDSTILL AND STOCK RESTRICTION AGREEMENT]<PAGE>

                                                               EXHIBIT 10.3

                                                               EXECUTION COPY

                              REGISTRATION RIGHTS AGREEMENT

      This REGISTRATION RIGHTS AGREEMENT (this "Agreement") is made as of
June 14, 2000, by and between Commerce One, Inc., a Delaware corporation (the
"Company") and SAP Aktiengesellschaft, a stock corporation organized under
the laws of the Federal Republic of Germany ("SAP AG").

      WHEREAS, subject to the terms and conditions of the Share Purchase
Agreement, of even date herewith, by and between the Company and SAP AG (the
"Share Purchase Agreement"), the Company has sold shares of its common stock
(the "Shares") to SAP AG; and

      WHEREAS, subject to the terms and conditions set forth herein, the
Company has agreed to grant  certain registration rights to SAP AG with
respect to the Shares.

      NOW, THEREFORE, in consideration of the promises, mutual covenants and
conditions herein contained, and of other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged, the parties
hereby agree as follows:

      1. DEFINITIONS.  For purposes of this Agreement, the following terms
shall have the following respective meanings:

      "1933 Act" means the Securities Act of 1933, as amended.

      "1934 Act" means the Securities Exchange Act of 1934, as amended.

      "Eligible Period" means the period (a) commencing on the earlier of (i)
the second anniversary of the date of this Agreement and (ii) the Transfer
Restriction Termination Date and (b) terminating on the fifth anniversary of
the date of this Agreement.

      "Existing Registration Rights Agreement" means the Fifth Amended and
Restated Registration Rights Agreement, dated February 9, 2000, by and among
the Company and certain of its stockholders.

      "GM Holder" means General Motors Corporation and any affiliate of
General Motors Corporation, or any assignee or transferee that possesses
registration rights pursuant to the GM Registration Rights Agreement.

      "GM Registration Rights Agreement" means the Registration Rights
Agreement, dated January 24, 2000, by and among the Company, General Motors
Corporation and certain other parties.

      "Holders" shall have the meaning ascribed to it in the Existing
Registration Rights Agreement.

<PAGE>

      "Register," "registered," and "registration" refers to a registration
effected by preparing and filing a registration statement or similar document
in compliance with the 1933 Act, and the declaration or ordering of
effectiveness of such registration statement or document.

      "Registrable Shares" means the shares of common stock of the Company
issued or issuable to the Stockholder in accordance with the terms and
conditions of the Share Purchase Agreement, and any securities of the Company
issued as a dividend on or other distribution with respect to, or in exchange
for or replacement of, such common stock.

      "Registration Statement" means any registration statement described in
Sections 2.1 or 2.2 of this Agreement.

      "Rule 144" means Rule 144 promulgated under the 1933 Act.

      "Standstill Agreement" shall mean that Standstill and Stock Restriction
Agreement, of even date herewith, by and between the Company and SAP AG.

      "Stockholder" shall mean SAP AG or any assignee or transferee to which
SAP AG's rights and obligations under this Agreement have been assigned
pursuant to Section 11.5.

      "SEC" means the Securities and Exchange Commission.

      "Transfer Restriction Termination Date" shall have the meaning as
ascribed to it in the Standstill Agreement.

      2. REGISTRATION RIGHTS.

            2.1 DEMAND REGISTRATION.

                  (a) If at any time during the Eligible Period the
Stockholder requests in writing (the "Stockholder Demand") that the Company
file a registration statement on Form S-3 (or any successor form to Form S-3)
for a public offering of shares of the Registrable Shares the Company shall,
subject to Section 4.1, file such Registration Statement with the SEC within
forty-five (45) days after its receipt of such request.  The Company shall
use commercially reasonable efforts to cause such Registration Statement to
be declared effective as soon thereafter as practicable and keep such
registration statement effective until the Stockholder notifies the Company
in writing that the Company is no longer required to keep such Registration
Statement effective. In no event, however, shall the Company be required to
(i) effect more than two (2) registrations pursuant to this section or (ii)
keep one or more registration statements filed pursuant to this section
effective for more than an aggregate of one hundred twenty (120) days.  In
the event the registration is proposed to be part of a firm commitment
underwritten public offering, the substantive provisions of Section 2.3 shall
be applicable to each such registration initiated under this Section 2.1 and
the piggyback registration rights of Holders and GM Holders (to the extent
provided for, in the Existing Registration Rights Agreement and the GM
Registration Rights Agreement) shall be applicable to a registration effected
pursuant to this Section 2.1.

                                      -2-

<PAGE>

                  (b) Notwithstanding the foregoing, the Company shall not be
obligated to take any action pursuant to subparagraph (a):

                        (i) if the Company, within ten (10) days of the
receipt of the Stockholder Demand, gives notice of its BONA FIDE intention to
effect the filing of a registration statement with the SEC within forty-five
(45) days of receipt of such demand (other than a registration relating
primarily to the sale of securities to participants in a Company stock plan
of employee benefit plan, a transaction covered by Rule 145 under the 1933
Act or the resale of securities issued in such a transaction, a registration
in which the only stock being registered is Common Stock issuable upon
conversion or exchange of debt securities which are also being registered,
any registration on any form which does not include substantially the same
information as would be required to be included in a registration statement
covering the sale of the Registrable Shares, or a registration initiated
under Section 2.1 or 2.2 of the GM Registration Rights Agreement) PROVIDED,
HOWEVER, that if such registration statement is not filed by the Company
within 45 days of receipt of such Stockholder Demand and declared effective
by the Commission with 120 days after the Company's receipt of such
Stockholder Demand, the Company shall be obligated to cause such Registrable
Shares of the Stockholder to be registered in accordance with the provisions
of this Section 2.1 provided that the Company is actively employing in good
faith all reasonable efforts to cause such registration statement to become
effective;

                        (ii) during the period starting with the Company's
date of filing of, and ending on the date ninety (90) days immediately
following, the effective date of any registration statement pertaining to
securities of the Company, which registration was either filed as a result of
the exercise by Stockholder of its rights pursuant to Section 2.1 hereof or
was subject to Section 2.2 hereof.

            2.2 PIGGYBACK REGISTRATION.

                  (a) If at any time during the Eligible Period, the Company
proposes to register (for its own account, on behalf of its existing
stockholders, or a combination of the foregoing) any of its common stock
under the 1933 Act in connection with a public offering of such common stock
solely for cash (other than a registration relating primarily to the sale of
securities to participants in a Company stock plan of employee benefit plan,
a transaction covered by Rule 145 under the 1933 Act or the resale of
securities issued in such a transaction (including the planned registration
in July 2000 of the resale of up to 2,460,000 shares of common stock issued
in connection with Company's acquisitions of Commerce Bid and Mergent
Systems), a registration in which the only stock being registered is Common
Stock issuable upon conversion or exchange of debt securities which are also
being registered, any registration on any form which does not include
substantially the same information as would be required to be included in a
registration statement covering the sale of the Registrable Shares or a
registration initiated under Section 2.1 or 2.2 of the GM Registration Rights
Agreement) the Company shall, at such time, give the Stockholder notice of
such registration.  Upon the written request of the Stockholder, given within
ten (10) days after notice has been given by the Company in accordance with
Section 11.1, the Company shall, subject

                                      -3-

<PAGE>

to Section 2.3, cause to be registered under the 1933 Act all of the
Registrable Shares that the Stockholder has requested to be registered.

                  (b) In the event that any registration is initiated
pursuant to Sections 2.1 or 2.2 of the GM Registration Rights Agreement, the
Company shall, upon written notice from the Stockholder of its desire to
"piggyback" on such registration statement, seek written consent from the GM
Holders to permit such "piggyback" on the registration statement by the
Stockholder in accordance with the terms of this Agreement.

            2.3 UNDERWRITING REQUIREMENTS.

                  (a) In connection with any underwritten public offering,
the Company shall not be required to include any of the Stockholder
Registrable Shares in such underwriting unless the Stockholder accepts the
terms of the underwriting as agreed upon between the Company and the
underwriters for the offering (which underwriters shall be selected by the
Company).

                  (b) If the total amount of securities, including
Registrable Shares, requested to be included in an underwritten public
offering exceeds the amount of securities that the underwriters determine in
their sole discretion is compatible with the success of the offering, then
the Company shall be required to include in the offering only that number of
such securities, including Registrable Shares, which the underwriters
determine in their sole discretion will not jeopardize the success of the
offering.  In such event, the Company may reduce the number of Registrable
Shares to be included in the offering prior to reducing or excluding the
shares proposed to be offered by the Company, the holders of registration
rights under the Existing Registration Rights Agreement and the holders of
registration rights under the GM Registration Rights Agreement.

      3. FURTHER OBLIGATIONS OF THE COMPANY AFTER REGISTRATION.

            3.1 BLUE SKY COMPLIANCE.  The Company shall, as soon as
reasonably possible after the effectiveness of a Registration Statement, use
its best efforts to register and qualify the Registrable Shares covered by
the Registration Statement under such other securities or "blue sky" laws of
such jurisdictions as shall be reasonably requested by the Stockholder,
provided that the Company shall not be required in connection therewith or as
a condition thereto to qualify to do business or to file a general consent to
service of process in any such states or jurisdictions unless the Company is
already subject to service in such jurisdiction and except as may be required
by the 1933 Act.

            3.2 FURNISHING OF PROSPECTUS.  With respect to a Registration
Statement filed pursuant to Sections 2.1 or 2.2, the Company shall furnish to
the Stockholder copies of any preliminary prospectus and, as soon as
reasonably possible after the effectiveness of the Registration Statement,
furnish to the Stockholder such numbers of copies of a final prospectus in
conformity with the requirements of the 1933 Act, and such other documents as
the Stockholder may reasonably request, in order to facilitate the resale or
other disposition of Registrable Shares owned by it.

                                      -4-

<PAGE>

            3.3 AMENDMENTS.  With respect to a Registration Statement filed
pursuant to Section 2.1 or 2.2 of this Agreement, and, subject to Section 4.1
of this Agreement, the Company shall prepare and file with the SEC such
amendments to the Registration Statement and amendments or supplements to the
prospectus contained therein as may be necessary to keep such Registration
Statement effective and such Registration Statement and prospectus accurate
and complete for the entire period for which the Registration Statement
remains effective.

            3.4 NOTICES.  The Company shall:

                  (a) Notify the Stockholder, promptly after it shall receive
notice thereof, of the date and time when any Registration Statement and each
post-effective amendment thereto has become effective;

                  (b) Notify the Stockholder promptly of any request by the
SEC for the amending or supplementing of any Registration Statement or
prospectus or for additional information;

                  (c) Notify the Stockholder, at any time when a prospectus
relating to the Registrable Shares is required to be delivered under the
Securities Act, of any event which would cause any such prospectus or any
other prospectus as then in effect to include an untrue statement of a
material fact or omit to state any material fact required to be stated
therein or necessary to make the statements therein, in light of the
circumstances under which they were made, not misleading, and, subject to
Section 4.1, promptly prepare and file with the SEC, and promptly notify the
Stockholder of the filing of, such amendments or supplements to any
Registration Statement or prospectus as may be necessary to correct any such
statements or omissions;

                  (d) Notify Stockholder, promptly after it shall receive
notice of the issuance of any stop order by the SEC suspending the
effectiveness of any Registration Statement or the initiation or threatening
of any proceeding for that purpose and, subject to Section 4.1, promptly use
commercially reasonable efforts to prevent the issuance of any stop order or
to obtain its withdrawal if such stop order should be issued.

      4. CONDITIONS AND LIMITATIONS ON REGISTRATION RIGHTS.  The registration
rights granted by this Agreement are subject to the following additional
conditions and limitations:

            4.1 DELAYS AND SUSPENSION.  The Company may delay the filing of,
or suspend or delay the effectiveness of a Registration Statement for up to
thirty (30) days, if the Company shall furnish to the Stockholder a
certificate signed by the Chief Executive Officer of the Company stating that
in the good faith judgment of the Board of Directors it would be seriously
detrimental to the Company or its stockholders for such a registration
statement to be filed or declared effective or for an effective registration
statement not to be suspended. In such event, the Company's obligation under
this Agreement to file a registration statement, seek effectiveness of a
registration statement or keep such registration statement effective shall be
deferred for a period not to exceed sixty (60) days from the receipt of the
request to file such registration by the Stockholder, provided that the
Company may not exercise this right of deferral for an aggregate of in excess
of seventy-five (75)

                                      -5-

<PAGE>

days in any one year period.  If the Company suspends the effectiveness of a
Registration Statement, the Company will promptly deliver notice to the
Stockholder of such suspension and will again deliver notice to the
Stockholder when such suspension is no longer necessary.  The duration for
which the Company is required to keep a Registration Statement effective
shall be extended by an additional number of days equal to the length of any
suspension period.

            4.2 AMENDED OR SUPPLEMENTED PROSPECTUS.  The Stockholder agrees
that, upon receipt of any notice from the Company described in Section 4.1
hereof that suspends an effective registration statement, the Stockholder
shall forthwith discontinue disposition of Registrable Shares until such
Stockholder's receipt of copies of a supplemented or amended prospectus from
the Company, or until it is advised in writing by the Company that the use of
the prospectus may be resumed, and has received copies of any additional or
supplemental filings which are incorporated by reference in the prospectus.
If so directed by the Company, the Stockholder will deliver to the Company
all copies of the prospectus covering such Registrable Shares current at the
time of receipt of such notice of suspension.

      5. INDEMNIFICATION.

            5.1 The Company will indemnify the Stockholder, each of its
officers, directors and partners, legal counsel, agents and each person
controlling the Stockholder within the meaning of Section 15 of the 1933 Act,
with respect to which registration, qualification or compliance has been
effected pursuant to this Agreement, and each underwriter, if any, and each
person who controls any underwriter within the meaning of Section 15 of the
1933 Act, against all expenses, claims, losses, damages and liabilities (or
actions in respect thereof), including any of the foregoing incurred in
settlement of any litigation, (commenced or threatened), arising out of or
based on any untrue statement (or alleged untrue statement) of a material
fact contained in any registration statement, pro-spectus, or other document,
or any amendment or supplement thereto, incident to any such registration,
qualification or compliance, or based on any omission (or alleged omission)
to state therein a material fact required to be stated therein or necessary
to make the statements therein, in the light of the circumstances under which
they were made, not misleading, or any violation by the Company of the 1933
Act, the 1934 Act, and any state securities laws or any rule, regulation or
qualification promulgated thereunder, and the Company will reimburse the
Stockholder, each of its officers, directors, and partners, legal counsel,
agents and each person controlling the Stockholder, each such underwriter and
each person who controls any such underwriter, for any legal and any other
expenses reasonably incurred, in connection with investigating, preparing or
defending any such claim, loss, damage, liability or action, PROVIDED,
HOWEVER,  that the Company will not be liable in any such case to the extent
that any such claim, loss, damage, liability or expense arises out of or is
based on any untrue statement or omission or alleged untrue statement or
omission, made in reliance upon and in conformity with written information
furnished to the Company by the Stockholder, controlling person or
underwriter expressly for use therein.

                  The foregoing indemnity is subject to the condition that,
insofar as it relates to any such untrue statement, alleged untrue statement,
omission or alleged omission made in a preliminary prospectus on file with
the SEC at the time the registration statement becomes effective

                                      -6-

<PAGE>

or the amended prospectus filed with the SEC pursuant to Rule 424(b), as
amended from time to time (the "Final Prospectus"), such indemnity shall not
inure to the benefit of:  (a) the Stockholder (i) if a copy of the Final
Prospectus was not furnished by the Stockholder to the person asserting the
loss, liability, claim or damage at or prior to the time such action as
required by the 1933 Act and such Final Prospectus would have cured the
defect giving rise to the loss, liability, claim or damage or (ii) to the
extent that such untrue statement, alleged untrue statement, omission or
alleged omission is made in reliance upon and in conformity with written
information furnished to the Company by the Stockholder expressly for use
therein, or (b) any underwriter (i) if a copy of the Final Prospectus was not
furnished to the person asserting the loss, liability, claim or damage at or
prior to the time such action as required by the 1933 Act and the Final
Prospectus would have cured the defect giving rise to the loss, liability,
claim or damage or (ii) to the extent that such untrue statement, alleged
untrue statement, omission or alleged omission is made in reliance on and in
conformity with written information furnished to the Company by the
underwriter for use therein.

            5.2 The Stockholder will, if Registrable Shares held by the
Stockholder are included in the securities as to which such registration,
qualification or compliance is being effected, indemnify the Company, each of
its directors and officers, each underwriter, if any, of the Company's
securities covered by such a registration statement, each person who controls
the Company or such underwriter within the meaning of Section 15 of the 1933
Act, against all expenses, claims, losses, damages and liabilities (or
actions in respect thereof), including any of the foregoing incurred in
settlement of any litigation (commenced or threatened), arising out of or
based on any untrue statement (or alleged untrue statement) of a material
fact contained in any such registration statement, prospectus, offering
circular or other document, or any amendment or supplement thereto, incident
to such registration, qualification or compliance, or any omission (or
alleged omission) to state therein a material fact required to be stated
therein or necessary to make the statements therein, in the light of the
circumstances under which they were made, not misleading, and, severally, and
not jointly, will reimburse the Company, such directors, officers, persons,
underwriters or control persons for any legal and any other expenses
reasonably incurred, in connection with investigating or defending any such
claim, loss, damage, liability or action, in each case to the extent, but
only to the extent, that such untrue statement (or alleged untrue statement)
or omission (or alleged omission) is made in such registration statement,
prospectus, offering circular or other document in reliance upon and in
conformity with written information furnished to the Company by the
Stockholder expressly for use therein.  Notwithstanding the foregoing, the
liability of the Stockholder under this Section 5 shall be limited to an
amount equal to the net proceeds received by the Stockholder from the sale of
shares in such registration.

            5.3 Each party entitled to indemnification under this Section 5
(the "Indemnified Party") shall give notice to the party required to provide
indemnification (the "Indemnifying Party") promptly after such Indemnified
Party has actual knowledge of any claim as to which indemnity may be sought,
and shall permit the Indemnifying Party to assume the defense of any such
claim or any litigation resulting therefrom, provided that counsel for the
Indemnifying Party, who shall conduct the defense of such claim or
litigation, shall be approved by the Indemnified Party (whose approval shall
not unreasonably be withheld), and the Indemnified Party may participate in
such defense at such party's expense, and provided further that the failure
of any Indemnified Party to give notice as

                                      -7-

<PAGE>

provided herein shall not relieve the Indemnifying Party of its obligations
under this Agreement, unless the failure to give such notice is materially
prejudicial to an Indemnifying Party's ability to defend such action, and
provided further that an Indemnified Party shall have the right to retain its
own counsel, with the fees and expenses of such counsel to be paid by the
Indemnifying Party, if representation of such Indemnified Party by the
counsel retained by the Indemnifying Party would be inappropriate due to
actual or potential differing interests between such Indemnified Party and
any other party represented by such counsel in such proceeding.  No
Indemnifying Party, in the defense of any such claim or litigation, shall,
except with the consent of each Indemnified Party, consent to entry of any
judgment or enter into any settlement which does not include as an
unconditional term thereof the giving by the claimant or plaintiff to such
Indemnified Party of a release from all liability in respect to such claim or
litigation.

            5.4 If the indemnification provided for in this Section 5 is held
by a court of competent jurisdiction to be unavailable to an Indemnified
Party with respect to any losses, claims, damages or liabilities referred to
herein, the Indemnifying Party, in lieu of indemnifying such Indemnified
Party thereunder, shall to the extent permitted by applicable law contribute
to the amount paid or payable by such Indemnified Party as a result of such
loss, claim, damage or liability in such proportion as is appropriate to
reflect the relative fault of the Indemnifying Party on the one hand and of
the Indemnified Party on the other in connection with the violation(s) that
resulted in such loss, claim, damage or liability, as well as any other
relevant equitable considerations.  The relative fault of the Indemnifying
Party and of the Indemnified Party shall be determined by a court of law by
reference to, among other things, whether the untrue or alleged untrue
statement of a material fact or the omission to state a material fact relates
to information supplied by the Indemnifying Party or by the Indemnified Party
and the parties' relative intent, knowledge, access to information and
opportunity to correct or prevent such statement or omission; provided, that
in no event shall any contribution by the Stockholder hereunder exceed the
net proceeds from the offering received by the Stockholder.

            5.5 The obligations of the Company and the Stockholder under this
Section 5 shall survive completion of any offering of Registrable Securities
in a registration statement and the termination of this Agreement.

      6. INFORMATION FROM STOCKHOLDER.  It shall be a condition precedent to
the obligations of the Company to take any action pursuant to this Agreement
with respect to the Registrable Shares of the Stockholder that the
Stockholder shall furnish to the Company such information regarding itself,
the Registrable Shares held by it, and the intended method of disposition of
such securities, as shall be required to effect the registration of the
Registrable Shares.

      7. EXPENSES OF REGISTRATION.  The Company shall pay all registration,
filing and qualification fees (including SEC filing fees and the listing fees
of the Nasdaq Stock Market or any stock exchange on which the Company
securities are traded) attributable to the Registrable Shares registered
under this Agreement, and any legal, accounting or other professional fees or
expenses incurred by the Company. The Stockholder shall pay all underwriting
discounts, selling commissions

                                      -8-

<PAGE>

and stock transfer taxes, if any, attributable to the sale of such securities
registered by the Stockholder and any legal, accounting or other professional
fees incurred by the Stockholder.

      8. REPORTS UNDER THE SECURITIES EXCHANGE ACT.  The Company agrees to
file with the SEC in a timely manner all reports and other documents and
information required of the Company under the 1934 Act, and take such other
actions as may be necessary to assure the availability of Form S-3 for use in
connection with the registration rights provided in this Agreement and Rule
144 for use in connection with resales of the Registrable Shares.

      9. RULE 144.  In the event that all of the Stockholder's Registrable
Shares may, under Rule 144, be resold or otherwise disposed of in a ninety
(90) day period without registration under the 1933 Act, the registration
rights granted under this Agreement to such Stockholder and the obligations
of the Company hereunder (other than its obligations under Sections 5 and 8
and this Section 9) to such Stockholder, shall automatically terminate in
their entirety and be of no further force and effect whatsoever without any
further action on the part of the Company or the Stockholder.

      10. MARKET STAND-OFF.  The Stockholder agrees that, upon the request of
the underwriters managing any underwritten public offering of the Company's
securities in connection with an effective registration statement under the
1933 Act, it will not offer, pledge, sell, contract to sell, sell any option
or contract to purchase, purchase any option or contract to sell, grant any
option, right or warrant to purchase, or otherwise transfer or dispose of,
directly or indirectly, the Registrable Shares other than those included in
the registration, without the prior written consent of such underwriters, for
such period of time, not to exceed ninety (90) days (or such lesser period as
executive officers or directors of the Company are so restricted with respect
to the transfer of shares of common stock of the Company held by them) after
the effective date of the registration statement relating thereto, provided
that such registration was filed as a result of the exercise by Stockholder
of its rights pursuant to Section 2.1 hereof or was subject to Section 2.2
hereof.  The Stockholder agrees that, if requested by the underwriters for
such an offering, it will enter into a lock-up agreement directly with the
underwriters on substantially the same terms and conditions as described
above.  The Stockholder agrees that the Company may instruct its transfer
agent to place stop-transfer notations in its records to enforce the
provisions of this Section 10.

      11. MISCELLANEOUS.

            11.1 NOTICES.  All notices and other communications required or
permitted hereunder shall be made in the manner and to addresses set forth in
the Share Purchase Agreement.

            11.2 INTERPRETATION.  The words "include," "includes" and
"including" when used herein shall be deemed in each case to be followed by
the words "without limitation."  The headings contained in this Agreement are
for reference purposes only and shall not affect in any way the meaning or
interpretation of this Agreement.

            11.3 COUNTERPARTS.  This Agreement may be executed in one or more
counterparts, all of which shall be considered one and the same agreement and
shall become effective when one or

                                      -9-

<PAGE>

more counterparts have been signed by each of the parties and delivered to
the other party, it being understood that all parties need not sign the same
counterpart.

            11.4 ENTIRE AGREEMENT.  This Agreement and the documents and
instruments and other agreements among the parties hereto referenced herein:
(a) constitute the entire agreement among the parties with respect to the
subject matter hereof and supersede all prior agreements and understandings,
both written and oral, among the parties with respect to the subject matter
hereof; and (b) are not intended to confer upon any other person any rights
or remedies hereunder.

            11.5 ASSIGNMENT.  Stockholder may transfer or assign its rights
and obligations hereunder together with any Registrable Shares transferred or
assigned in accordance with the terms of the Standstill Agreement to any
Affiliate of Stockholder, as long as such transferee or assignee of the
Registrable Shares executes and delivers a counterpart copy of this Agreement
thereby agreeing to be bound by the terms and provisions set forth herein.
Except as permitted herein, any assignment of rights or delegation of duties
under this Agreement by a party without the prior written consent of the
other parties, if such consent is required hereby, shall be void ab initio.
This Agreement shall be binding upon and inure to the benefit of the parties
hereto and their respective successors and assigns.

            11.6 SEVERABILITY.  In the event that any provision of this
Agreement or the application thereof, becomes or is declared by a court of
competent jurisdiction to be illegal, void or unenforceable, the remainder of
this Agreement will continue in full force and effect and the application of
such provision to other persons or circumstances will be interpreted so as
reasonably to effect the intent of the parties hereto.  The parties further
agree to replace such void or unenforceable provision of this Agreement with
a valid and enforceable provision that will achieve, to the extent possible,
the economic, business and other purposes of such void or unenforceable
provision.

            11.7 CERTAIN COMPANY REPRESENTATIONS.  This Agreement has been
duly authorized by all necessary action by the Company, and the Company's
execution, delivery and performance of this Agreement does not violate any
other agreement or instrument to which it is currently a party. As of the
date hereof, the Company has not granted registration rights to any holder of
its securities except pursuant to this Agreement, the Existing Registration
Rights Agreement that grants registration rights to certain stockholders of
the Company with respect to 18,908,320 shares of common stock and the GM
Registration Rights Agreement that grants to GM and one of its affiliates
registration rights with respect to 28,800,000 shares of common stock.  The
Company hereby agrees not to grant any registration rights that materially
impair the registration rights granted to the Stockholder hereunder.

            11.8 ATTORNEYS' FEES.  In any action at law or suit in equity in
relation to this Agreement, the prevailing party in such action or suit shall
be entitled to receive a reasonable sum for its attorneys' fees and all other
reasonable costs and expenses incurred in such action or suit.

                                     -10-

<PAGE>

            11.9 GOVERNING LAW.  This Agreement shall be governed by and
construed in accordance with the laws of the State of Delaware, regardless of
the laws that might otherwise govern under applicable principles of conflicts
of laws thereof.

            11.10 TERM.  Except as expressly provided herein, the rights and
obligations hereunder shall terminate five (5) years from the date of this
Agreement.

           [THE REMAINDER OF THIS PAGE IS INTENTIONALLY LEFT BLANK]

                                     -11-

<PAGE>

      IN WITNESS WHEREOF, the undersigned have executed this Agreement as of
the date first above written.

                                 COMMERCE ONE, INC.

                                 By:  /s/ Robert M. Tarkoff
                                    --------------------------------------

                                 Name:  Robert M. Tarkoff
                                 Title: Senior Vice President, Corporate
                                        Development and General Counsel

                                 SAP AG

                                 By:  /s/ Prof. Dr. Henning Kagermann
                                    --------------------------------------

                                 Name:  Prof. Dr. Henning Kagermann
                                 Title: Member of the Executive Board

                                 By:  /s/ Werner Sinzig
                                    --------------------------------------
                                 Name:   Werner Sinzig
                                 Title:  Prokurist

                  [SIGNATURE PAGE TO REGISTRATION RIGHTS AGREEMENT]

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