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                                                                    EXHIBIT 10.4

                                    LOCK-UP AGREEMENT

The viaLink Company
13155 Noel Road,
Suite 800
Dallas, Texas  75204

Ladies and Gentlemen:

         The undersigned is a securityholder of The viaLink Company (the
"Company"). The undersigned hereby irrevocably agrees not to, directly or
indirectly, effect any public sale or distribution (including sales pursuant to
Rule 144) of any shares of Applicable Common Stock, as hereinafter defined, or
any securities convertible into or exercisable or exchangeable for or repayable
with the Applicable Common Stock, for a period beginning February 1, 2001 and
ending 180 days thereafter (the "Lock-Up Period"). As used herein, the term
"Applicable Common Stock" shall mean (i) Common Stock received by the
Undersigned pursuant to conversion by the undersigned of one-half of the
outstanding balance of that certain Subordinated Secured Convertible Promissory
Note dated February 4, 1999 executed by the Company and payable to the
undersigned for a conversion price equal to $1.75 per share, and (ii) any Common
Stock received by the undersigned pursuant to the exercise by the undersigned of
that certain Series A Common Stock Purchase Warrant dated February 1, 2001
issued by the Company for the benefit of the undersigned; provided that the term
"Applicable Common Stock" shall not include any other shares of Common Stock at
any time held or received by the undersigned.

         Notwithstanding the foregoing, the undersigned may transfer any shares
of Applicable Common Stock or securities convertible into or exchangeable or
exercisable for Applicable Common Stock, to one or more of its affiliates or
stockholders; provided, however, that in each case each transferee shall agree
to be subject to the provisions hereof.

         The undersigned further confirms that this Lock-Up Agreement is
irrevocable and shall be binding upon the undersigned's successors and assigns.
The undersigned agrees and consents to the entry of stop transfer instructions
with the Company's transfer agent against the transfer of Applicable Common
Stock or other securities of the Company held by the undersigned except in
compliance with this Lock-Up Agreement.

                                      -1-

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       The Lock-Up Period described herein shall supersede any prior lock-up or
similar restrictive period agreed to by the undersigned in connection with the
sale or distribution of any Common Stock.

Dated: April 10, 2001.

                                             HEWLETT-PACKARD COMPANY

                                             By: /s/ HANIF JAMAL
                                                --------------------------------
                                             Name:   Hanif Jamal
                                                  ------------------------------
                                             Title:  Vice President and General
                                                     Manager of Business
                                                     Development
                                                   -----------------------------

                                             Accepted and Agreed:

                                             THE VIALINK COMPANY

                                             By: /s/ WILLIAM P. CREASMAN
                                                --------------------------------
                                             Name:   William P. Creasman
                                                  ------------------------------
                                             Title:  Vice President, Chief
                                                     Financial Officer and
                                                     General Counsel
                                                   -----------------------------

                                      -2-<PAGE>   1
                                   EXHIBIT 4.2

                            2000 CNET NETWORKS, INC.

                              STOCK INCENTIVE PLAN

1. PURPOSE OF THE PLAN

    The purpose of the Plan is to aid the Company and its Affiliates in
recruiting and retaining key employees, directors or consultants of outstanding
ability and to motivate such employees, directors or consultants to exert their
best efforts on behalf of the Company and its Affiliates by providing incentives
through the granting of Awards. The Company expects that it will benefit from
the added interest which such key employees, directors or consultants will have
in the welfare of the Company as a result of their proprietary interest in the
Company's success.

2. DEFINITIONS

    The following capitalized terms used in the Plan have the respective
meanings set forth in this Section:

    (a) Act: The Securities Exchange Act of 1934, as amended, or any successor
thereto.

    (b) Affiliate: With respect to the Company, any entity directly or
indirectly controlling, controlled by, or under common control with, the Company
or any other entity designated by the Board in which the Company or an Affiliate
has an interest.

    (c) Award: An Option or Other Stock-Based Award granted pursuant to the
Plan.

    (d) Beneficial Owner: A "beneficial owner", as such term is defined in Rule
13d-3 under the Act (or any successor rule thereto).

    (e) Board: The Board of Directors of the Company.

    (f) Change in Control: The occurrence of any of the following events:

        (i) any Person (other than the Company, any trustee or other fiduciary
    holding securities under an employee benefit plan of the Company, or any
    company owned, directly or indirectly, by the shareholders of the Company in
    substantially the same proportions as their ownership of stock of the
    Company), becomes the Beneficial Owner, directly or indirectly, of
    securities of the Company, representing 50% or more of the combined voting
    power of the Company's then-outstanding securities;

        (ii) during any period of twenty-four consecutive months (not including
    any period prior to the Effective Date), individuals who at the beginning of
    such period constitute the Board, and any new director (other than (A) a
    director nominated by a Person who has entered into an agreement with the
    Company to effect a transaction described in Sections 2(e)(i), (iii) or
    (iv) of the Plan or (B) a director nominated by any Person (including the
    Company) who publicly announces an intention to take or to consider taking
    actions (including, but not limited to, an actual or threatened proxy
    contest) which if consummated would constitute a Change in Control) whose
    election by the Board or nomination for election by the Company's
    shareholders was approved by a vote of at least two-thirds (2/3) of the
    directors then still in office who either were directors at the beginning of
    the period or whose election or nomination for election was previously so
    approved, cease for any reason to constitute at least a majority thereof;

        (iii) the consummation of any transaction or series of transactions
    resulting in a merger or consolidation, in which the Company is involved,
    other than a merger or consolidation which would result in the shareholders
    of the Company immediately prior thereto continuing to own (either by
    remaining outstanding or by being converted into voting securities of the
    surviving entity) more than 50% of the combined voting power of the voting
    securities of the Company or such surviving entity outstanding immediately
    after such merger or consolidation; or

        (iv) the complete liquidation of the Company or the sale or disposition
    by the Company of all or substantially all of the Company's assets, other
    than a liquidation of the Company into a wholly-owned subsidiary.

    (g) Code: The Internal Revenue Code of 1986, as amended, or any successor
thereto.

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    (h) Committee: The Compensation Committee of the Board.

    (i) Company: CNET Networks, Inc., a Delaware corporation.

    (j) Effective Date: June 1, 2000.

    (k) Fair Market Value: On a given date, (i) if there should be a public
market for the Shares on such date, the arithmetic mean of the high and low
prices of the Shares as reported on such date on the Composite Tape of the
principal national securities exchange on which such Shares are listed or
admitted to trading, or, if the Shares are not listed or admitted on any
national securities exchange, the arithmetic mean of the per Share closing bid
price and per Share closing asked price on such date as quoted on the National
Association of Securities Dealers Automated Quotation System (or such market in
which such prices are regularly quoted) (the "NASDAQ"), or, if no sale of Shares
shall have been reported on the Composite Tape of any national securities
exchange or quoted on the NASDAQ on such date, then the immediately preceding
date on which sales of the Shares have been so reported or quoted shall be used,
and (ii) if there should not be a public market for the Shares on such date, the
Fair Market Value shall be the value established by the Committee in good faith.

    (l) ISO: An Option that is also an incentive stock option granted pursuant
to Section 6(d) of the Plan.

    (m) Other Stock-Based Awards: Awards granted pursuant to Section 7 of the
Plan.

    (n) Option: A stock option granted pursuant to Section 6 of the Plan.

    (o) Option Price: The purchase price per Share of an Option, as determined
pursuant to Section 6(a) of the Plan.

    (p) Participant: An employee, director or consultant who is selected by the
Committee to participate in the Plan.

    (q) Performance-Based Awards: Certain Other Stock-Based Awards granted
pursuant to Section 7(b) of the Plan.

    (r) Person: A "person", as such term is used for purposes of Section 13(d)
or 14(d) of the Act (or any successor section thereto).

    (s) Plan: The 2000 CNET Networks, Inc. Stock Incentive Plan.

    (t) Shares: Shares of common stock of the Company.

    (u) Subsidiary: A subsidiary corporation, as defined in Section 424(f) of
the Code (or any successor section thereto).

3. SHARES SUBJECT TO THE PLAN

    The total number of Shares which may be issued under the Plan is 5,000,000.
The maximum number of Shares for which Options (or Award other Section 7(b)) may
be granted during a calendar year to any Participant shall 800,000. The Shares
may consist, in whole or in part, of unissued Shares or treasury Shares. The
issuance of Shares or the payment of cash upon the exercise of an Award shall
reduce the total number of Shares available under the Plan, as applicable.
Shares which are subject to Awards which terminate or lapse may be granted again
under the Plan.

4. ADMINISTRATION

    The Plan shall be administered by the Committee, which may delegate its
duties and powers in whole or in part to any subcommittee thereof consisting
solely of at least two individuals who are intended to qualify as "non-employee
directors" within the meaning of Rule 16b-3 under the Act (or any successor rule
thereto) and "outside directors" within the meaning of Section 162(m) of the
Code (or any successor section thereto). Awards may, in the discretion of the
Committee, be made under the Plan in assumption of, or in substitution for,
outstanding awards previously granted by the Company or its affiliates or a
company acquired by the Company or with which the Company combines. The number
of Shares underlying such substitute awards shall be counted against the
aggregate number of Shares available for Awards under the Plan. The Committee is
authorized to interpret the Plan, to establish, amend and rescind any rules and
regulations relating to the Plan, and to make any other determinations that it
deems necessary or desirable for the administration of the Plan. The Committee
may correct any defect or supply any omission or reconcile any

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inconsistency in the Plan in the manner and to the extent the Committee deems
necessary or desirable. Any decision of the Committee in the interpretation and
administration of the Plan, as described herein, shall lie within its sole and
absolute discretion and shall be final, conclusive and binding on all parties
concerned (including, but not limited to, Participants and their beneficiaries
or successors). The Committee shall have the full power and authority to
establish the terms and conditions of any Award consistent with the provisions
of the Plan and to waive any such terms and conditions at any time (including,
without limitation, accelerating or waiving any vesting conditions). The
Committee shall require payment of any amount it may determine to be necessary
to withhold for federal, state, local or other taxes as a result of the exercise
of an Award. Unless the Committee specifies otherwise, the Participant may elect
to pay a portion or all of such withholding taxes by (a) delivery in Shares or
(b) having Shares withheld by the Company from any Shares that would have
otherwise been received by the Participant.

5. LIMITATIONS

    No Award may be granted under the Plan after the tenth anniversary of the
Effective Date, but Awards theretofore granted may extend beyond that date.

6. TERMS AND CONDITIONS OF OPTIONS

    Options granted under the Plan shall be, as determined by the Committee,
non-qualified or incentive stock options for federal income tax purposes, as
evidenced by the related Award agreements, and shall be subject to the foregoing
and the following terms and conditions and to such other terms and conditions,
not inconsistent therewith, as the Committee shall determine:

    (a) Option Price. The Option Price per Share shall be determined by the
Committee, but shall not be less than 100% of the Fair Market Value of the
Shares on the date an Option is granted.

    (b) Exercisability. Options granted under the Plan shall be exercisable at
such time and upon such terms and conditions as may be determined by the
Committee, but in no event shall an Option be exercisable more than ten years
after the date it is granted, provided that, in the case of CNET Europe, S.A., a
Subsidiary, Options shall be exercisable for a period of at least twelve (12)
years but not more than fifteen (15) years from the date of grant.

    (c) Exercise of Options. Except as otherwise provided in the Plan or in an
Award agreement, an Option may be exercised for all, or from time to time any
part, of the Shares for which it is then exercisable. For purposes of Section 6
of the Plan, the exercise date of an Option shall be the later of the date a
notice of exercise is received by the Company and, if applicable, the date
payment is received by the Company pursuant to clauses (i), (ii) or (iii) in the
following sentence. The purchase price for the Shares as to which an Option is
exercised shall be paid to the Company in full at the time of exercise at the
election of the Participant (i) in cash or its equivalent (e.g., by check), (ii)
to the extent permitted by the Committee, in Shares having a Fair Market Value
equal to the aggregate Option Price for the Shares being purchased and
satisfying such other requirements as may be imposed by the Committee; provided,
that such Shares have been held by the Participant for no less than six months
(or such other period as established from time to time by the Committee or
generally accepted accounting principles), (iii) partly in cash and, to the
extent permitted by the Committee, partly in such Shares or (iv) through the
delivery of irrevocable instruments to a broker to deliver promptly to the
Company an amount equal to the aggregate option price for the shares being
purchased. No Participant shall have any rights to dividends or other rights of
a stockholder with respect to Shares subject to an Option until the Participant
has given written notice of exercise of the Option, paid in full for such Shares
and, if applicable, has satisfied any other conditions imposed by the Committee
pursuant to the Plan.

    (d) ISOs. The Committee may grant Options under the Plan that are intended
to be ISOs. Such ISOs shall comply with the requirements of Section 422 of the
Code (or any successor section thereto). No ISO may be granted to any
Participant who at the time of such grant, owns more than ten percent of the
total combined voting power of all classes of stock of the Company or of any
Subsidiary, unless (i) the Option Price for such ISO is at least 110% of the
Fair Market Value of a Share on the date the ISO is granted and (ii) the date on
which such ISO terminates is a date not later than the day preceding the fifth
anniversary of the date on which the ISO is granted. Any Participant who
disposes of Shares acquired upon the exercise of an ISO either (i) within two
years after the date of grant of such ISO or (ii) within one year after the
transfer of such Shares to the Participant, shall notify the Company of such
disposition and of the amount realized upon such disposition.

    (e) Attestation. Wherever in this Plan or any agreement evidencing an Award
a Participant is permitted to pay the exercise price of an Option or taxes
relating to the exercise of an Option by delivering Shares, the Participant may,
subject to procedures satisfactory to the Committee, satisfy such delivery
requirement by presenting proof of beneficial ownership of such Shares, in which
case the Company shall treat the Option as exercised without further payment and
shall withhold such number of Shares from the Shares acquired by the exercise of
the Option.

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7. OTHER STOCK-BASED AWARDS

    (a) Generally. The Committee, in its sole discretion, may grant Awards of
Shares, Awards of restricted Shares and Awards that are valued in whole or in
part by reference to, or are otherwise based on the Fair Market Value of, Shares
("Other Stock-Based Awards"). Such Other Stock-Based Awards shall be in such
form, and dependent on such conditions, as the Committee shall determine,
including, without limitation, the right to receive one or more Shares (or the
equivalent cash value of such Shares) upon the completion of a specified period
of service, the occurrence of an event and/or the attainment of performance
objectives. Other Stock-Based Awards may be granted alone or in addition to any
other Awards granted under the Plan. Subject to the provisions of the Plan, the
Committee shall determine to whom and when Other Stock-Based Awards will be
made, the number of Shares to be awarded under (or otherwise related to) such
Other Stock-Based Awards; whether such Other Stock-Based Awards shall be settled
in cash, Shares or a combination of cash and Shares; and all other terms and
conditions of such Awards (including, without limitation, the vesting provisions
thereof and provisions ensuring that all Shares so awarded and issued shall be
fully paid and non-assessable).

    (b) Performance-Based Awards. Notwithstanding anything to the contrary
herein, certain Other Stock-Based Awards granted under this Section 8 may be
granted in a manner which is deductible by the Company under Section 162(m) of
the Code (or any successor section thereto) ("Performance-Based Awards"). A
Participant's Performance-Based Award shall be determined based on the
attainment of written performance goals approved by the Committee for a
performance period established by the Committee (i) while the outcome for that
performance period is substantially uncertain and (ii) no more than 90 days
after the commencement of the performance period to which the performance goal
relates or, if less, the number of days which is equal to 25 percent of the
relevant performance period. The performance goals, which must be objective,
shall be based upon one or more of the following criteria: (i) consolidated
earnings before or after taxes (including earnings before interest, taxes,
depreciation and amortization); (ii) net income; (iii) operating income; (iv)
earnings per Share; (v) book value per Share; (vi) return on shareholders'
equity; (vii) expense management; (viii) return on investment; (ix) improvements
in capital structure; (x) profitability of an identifiable business unit or
product; (xi) maintenance or improvement of profit margins; (xii) stock price;
(xiii) market share; (xiv) revenues or sales; (xv) costs; (xvi) cash flow;
(xvii) working capital and (xviii) return on assets. The foregoing criteria may
relate to the Company, one or more of its Subsidiaries or one or more of its
divisions or units, or any combination of the foregoing, and may be applied on
an absolute basis and/or be relative to one or more peer group companies or
indices, or any combination thereof, all as the Committee shall determine. In
addition, to the degree consistent with Section 162(m) of the Code (or any
successor section thereto), the performance goals may be calculated without
regard to extraordinary items. The maximum amount of a Performance-Based Award
during a calendar year to any Participant shall be: (x) with respect to
Performance-Based Awards that are Options, 800,000 Shares and (y) with respect
to Performance-Based Awards that are not Options, $10,000,000. The Committee
shall determine whether, with respect to a performance period, the applicable
performance goals have been met with respect to a given Participant and, if they
have, to so certify and ascertain the amount of the applicable Performance-Based
Award. No Performance-Based Awards will be paid for such performance period
until such certification is made by the Committee. The amount of the
Performance-Based Award actually paid to a given Participant may be less than
the amount determined by the applicable performance goal formula, at the
discretion of the Committee. The amount of the Performance-Based Award
determined by the Committee for a performance period shall be paid to the
Participant at such time as determined by the Committee in its sole discretion
after the end of such performance period; provided, however, that a Participant
may, if and to the extent permitted by the Committee and consistent with the
provisions of Section 162(m) of the Code, elect to defer payment of a
Performance-Based Award.

8. ADJUSTMENTS UPON CERTAIN EVENTS

    Notwithstanding any other provisions in the Plan to the contrary, the
following provisions shall apply to all Awards granted under the Plan:

    (a) Generally. In the event of any change in the outstanding Shares after
the Effective Date by reason of any Share dividend or split, reorganization,
recapitalization, merger, consolidation, spin-off, combination, combination or
transaction or exchange of Shares or other corporate exchange, or any
distribution to shareholders of Shares other than regular cash dividends or any
transaction similar to the foregoing, the Committee in its sole discretion and
without liability to any person may make such substitution or adjustment, if
any, as it deems to be equitable, as to (i) the number or kind of Shares or
other securities issued or reserved for issuance pursuant to the Plan or
pursuant to outstanding Awards, (ii) the maximum number of Shares for which
Options may be granted during a calendar year to any Participant (iii) the
maximum amount of a Performance-Based Award that may be granted during a
calendar year to any Participant, (iv) the Option Price and/or (v) any other
affected terms of such Awards.

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    (b) Change in Control. Except as otherwise provided in an Award agreement,
in the event of a Change in Control, the Committee in its sole discretion and
without liability to any person may take such actions, if any, as it deems
necessary or desirable with respect to any Award (including, without limitation,
(i) the acceleration of an Award, (ii) the payment of a cash amount in exchange
for the cancellation of an Award and/or (iii) the requiring of the issuance of
substitute Awards that will substantially preserve the value, rights and
benefits of any affected Awards previously granted hereunder) as of the date of
the consummation of the Change in Control.

9. NO RIGHT TO EMPLOYMENT OR AWARDS

    The granting of an Award under the Plan shall impose no obligation on the
Company or any Subsidiary to continue the employment or service or consulting
relationship of a Participant and shall not lessen or affect the Company's or
Subsidiary's right to terminate the employment or service or consulting
relationship of such Participant. No Participant or other Person shall have any
claim to be granted any Award, and there is no obligation for uniformity of
treatment of Participants, or holders or beneficiaries of Awards. The terms and
conditions of Awards and the Committee's determinations and interpretations with
respect thereto need not be the same with respect to each Participant (whether
or not such Participants are similarly situated).

10. SUCCESSORS AND ASSIGNS

    The Plan shall be binding on all successors and assigns of the Company and a
Participant, including without limitation, the estate of such Participant and
the executor, administrator or trustee of such estate, or any receiver or
trustee in bankruptcy or representative of the Participant's creditors.

11. NONTRANSFERABILITY OF AWARDS

    Unless otherwise determined by the Committee, an Award shall not be
transferable or assignable by the Participant otherwise than by will or by the
laws of descent and distribution. An Award exercisable after the death of a
Participant may be exercised by the legatees, personal representatives or
distributees of the Participant.

12. AMENDMENTS OR TERMINATION

    The Board may amend, alter or discontinue the Plan, but no amendment,
alteration or discontinuation shall be made which, (a) without the approval of
the shareholders of the Company, would (except as is provided in Section 8 of
the Plan), increase the total number of Shares reserved for the purposes of the
Plan or change the maximum number of Shares for which Awards may be granted to
any Participant or (b) without the consent of a Participant, would diminish any
of the rights of the Participant under any Award theretofore granted to such
Participant under the Plan; provided, however, that the Committee may amend the
Plan in such manner as it deems necessary to permit the granting of Awards
meeting the requirements of the Code or other applicable laws.

13. INTERNATIONAL PARTICIPANTS

    With respect to Participants who reside or work outside the United States of
America and who are not (and who are not expected to be) "covered employees"
within the meaning of Section 162(m) of the Code, the Committee may, in its sole
discretion, amend the terms of the Plan or Awards with respect to such
Participants in order to conform such terms with the requirements of local law.

14. CHOICE OF LAW

    The Plan shall be governed by and construed in accordance with the laws of
the State of Delaware without regard to conflicts of laws.

15. EFFECTIVENESS OF THE PLAN

    The Plan shall be effective as of the Effective Date.

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