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                                                                   EXHIBIT 10.19

THESE SECURITIES HAVE BEEN ISSUED PURSUANT TO EXEMPTIONS FOR NONPUBLIC OFFERINGS
FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT OF 1933, AS AMENDED,
AND APPLICABLE STATE SECURITIES LAWS, AND, ACCORDINGLY, THESE SECURITIES MAY NOT
BE RESOLD OR OTHERWISE DISPOSED OF UNLESS, IN THE OPINION OF COUNSEL FOR OR
SATISFACTORY TO THE ISSUER, REGISTRATION UNDER THE APPLICABLE FEDERAL OR STATE
SECURITIES LAWS IS NOT REQUIRED OR COMPLIANCE IS MADE WITH SUCH REGISTRATION
REQUIREMENTS.

        VOID AFTER 5:00 P.M. NEW YORK TIME, ON DECEMBER  , 2002

               WARRANT TO PURCHASE 350,000 SHARES OF COMMON STOCK

                                       OF

                                ENTERWORKS, INC.

        This is to certify that, FOR VALUE RECEIVED, BANK OF AMERICA, N.A. or
its registered assigns pursuant to Section (d) hereof ("Holder"), is entitled to
purchase, subject to the provisions of this Warrant, from Enterworks, Inc., a
Delaware corporation (the "Company"), 350,000 fully paid, validly issued and
nonassessable shares of Common Stock, par value $.01 per share, of the Company
("Common Stock"), at the exercise price of $1.15 per share until December   ,
2002. The number of shares of Common Stock to be received upon the exercise of
this Warrant and the price to be paid for each share of Common Stock may be
adjusted from time to time as hereinafter set forth. The shares of Common Stock
deliverable upon such exercise, and as adjusted from time to time, are
hereinafter sometimes referred to as "Warrant Shares," and the exercise price of
a share of Common Stock as adjusted from time to time is hereinafter sometimes
referred to as the "Exercise Price."

        (a)     EXERCISE OF WARRANT; NOTIFICATION OF EXPIRATION DATE OF WARRANT.
The Warrant may be exercised as to a minimum of _____ Warrant Shares at any time
or from time to time, until 5:00 P.M. New York time on December   , 2002 (the
"Expiration Date"), provided, however, that if such day is a day on which
banking institutions in the State of New York are authorized by law to close,
then on the next succeeding day which shall not be such a day. The Warrant may
be exercised by presentation and surrender hereof to the Company at its
principal office, or at the office of its stock transfer agent, if any, with the
Purchase Form annexed hereto duly executed (with signature guaranteed if
required by the Company or its stock transfer agent) and accompanied by payment
of the Exercise Price for the number of Warrant Shares specified in such form
and any applicable taxes. The purchase price for any Warrant Shares purchased
pursuant to the exercise of this Warrant shall be paid in full upon such
exercise in cash or by certified or bank check or pursuant to a cashless
exercise procedure whereby the Warrant Shares issued upon exercise of this
Warrant will be sold with Holder receiving the

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difference between the Exercise Price and the sale price, in cash, and the
Company receiving the Exercise Price for the Warrant Shares, in cash, or any
combination of the foregoing methods of paying the Exercise Price. In the
alternative, the Warrant may be exchanged for Warrant shares as described in
Section (1). As soon as practicable after each such exercise of the Warrants,
but not later than seven (7) business days from the date of such exercise, the
Company shall issue and deliver to the Holder a certificate or certificates for
the Warrant Shares issuable upon such exercise, registered in the name of the
Holder or the Holder's designee, except in the case of a cashless exercise. If
the Warrant should be exercised in part only, the Company shall, upon surrender
of the Warrant for cancellation, execute and deliver a new Warrant evidencing
the rights of the Holder thereof to purchase the balance of the Warrant Shares
purchasable thereunder. In the event of a cash exercise, upon receipt by the
Company of the Warrant at its office, or by the stock transfer agent of the
Company at its office, in proper form for exercise, together with the exercise
price thereof and taxes as aforesaid in cash or certified or bank check and the
investment letter described below, the Holder shall be deemed to be the holder
of record of the shares of Common Stock issuable upon such exercise,
notwithstanding that the stock transfer books of the Company shall then be
closed or that certificates representing such shares of Common Stock shall not
then be physically delivered to the Holder. In order to assure the availability
of an exemption from registration under the federal or applicable state
securities laws, the Company may condition the exercise of the Warrant upon the
Holder delivering to the Company an investment letter in the form as customarily
used by the Company from time to time in connection with the exercise of
non-registered options and warrants which are issued by the Company. It is
further understood that certificates for the Warrant Shares, if any, to be
issued upon exercise of the Warrant may contain a restrictive legend in
accordance with Section (j) hereof.

        (b)     RESERVATION OF SHARES. The Company shall at all times reserve
for issuance and/or delivery upon exercise of this Warrant such number of shares
of its Common Stock as shall be required for issuance and delivery upon exercise
of the Warrants. If the Common Stock is or becomes listed on any national
securities exchange or the NASDAQ National Market System, the Company shall also
list such shares on such exchange subject to notice of issuance or maintain the
listing of its Common Stock on the NASDAQ system, as the case may be.

        (c)     FRACTIONAL SHARES. No fractional shares or scrip representing
fractional shares shall be issued upon the exercise of the Warrant. With respect
to any fraction of a share called for upon any exercise hereof, the Company
shall pay to the Holder an amount in cash equal to such fraction multiplied by
the current market value of a share, determined as follows:

                (1) If the Common Stock is listed on a national securities
                exchange or admitted to unlisted trading privileges on such
                exchange or listed for trading on the NASDAQ National Market
                System, the current market value shall be the last reported sale
                price of the Common Stock on such exchange or system on the last
                business day prior to the date of exercise of this Warrant or if
                no such sale is made on such day, the average closing bid and
                asked prices for such day on such exchange or system;

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                (2) If the Common Stock is not so listed or admitted to unlisted
                trading privileges, the current market value shall be the mean
                of the last reported bid and asked prices reported by the
                National Quotation Bureau, Inc., on the last business day prior
                to the date of the exercise of this Warrant; or

                (3) If the Common Stock is not so listed or admitted to unlisted
                trading privileges and bid and asked prices are not so reported,
                the current market value shall be an amount, not less than the
                book value thereof as at the end of the most recent fiscal year
                of the Company ending prior to the date of the exercise of the
                Warrant, determined in such reasonable manner as may be
                prescribed by the Board of Directors of the Company.

        (d)     EXCHANGE, TRANSFER, ASSIGNMENT OR LOSS OF WARRANT. The Warrant
is exchangeable, without expense, at the option of the Holder, upon presentation
and surrender hereof to the Company or at the office of its stock transfer
agent, if any, for other Warrants of different denominations entitling the
Holder thereof to purchase in the aggregate the same number of shares of Common
Stock purchasable hereunder. Subject to Section (j) hereof, the Holder may
transfer or assign the Warrant, in whole or in part and from time to time. Upon
surrender of this Warrant to the Company at its principal office or at the
office of its stock transfer agent, if any, with the Assignment Form annexed
hereto duly executed (with signature guaranteed, if required by the Company or
its stock transfer agent) and funds sufficient to pay any transfer tax, the
Company shall, without charge, execute and deliver a new Warrant in the name of
the assignee or assignees named in such instrument of assignment and this
Warrant shall promptly be canceled. This Warrant may be divided by or combined
with other Warrants which carry the same rights upon presentation hereof at the
principal office of the Company or at the office of its stock transfer agent, if
any, together with a written notice specifying the names and denominations in
which new Warrants are to be issued and signed by the Holder hereof. The term
"Warrant" as used herein includes any Warrants into which this Warrant my be
divided or exchanged. Upon receipt by the Company of evidence satisfactory to it
of the loss, theft, destruction or mutilation of this Warrant, and in the case
of loss, theft or destruction, of reasonable satisfactory indemnification
(including a surety bond), and upon surrender and cancellation of this Warrant,
if mutilated, the Company will execute and deliver a new Warrant of like tenor,
date and amount. Any such new Warrant executed and delivered shall constitute an
additional contractual obligation on the part of the Company, whether or not the
original Warrant shall be at any time enforceable (subject to the Company's
right of indemnification as provided above) by anyone.

        (e)     RIGHTS OF THE HOLDER. The Holder shall not, by virtue hereof, be
entitled to any rights of a shareholder in the Company, either at law or equity,
and the rights of the Holder are limited to those expressed in the Warrant and
are not enforceable against the Company except to the extent set forth herein.

        (f)     ANTI-DILUTION PROVISIONS. So long as this Warrant shall be
outstanding, the Exercise Price in effect at any time and the number and kind of
securities purchasable upon the

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exercise of the Warrants shall be subject to adjustment from time to time upon
the happening of certain events as follows:

                (1) In case the Company shall (i) declare a dividend or make a
                distribution on its outstanding shares of Common Stock in shares
                of Common Stock, (ii) issue shares of Common Stock or securities
                convertible into Common Stock (other than shares of Series A
                Preferred Stock issued during December, 1999; warrants
                outstanding as of December __, 1999 including without limitation
                warrants to purchase 1,054,560 shares of Common Stock issued to
                Deutsche Banc Securities, Inc., and Common Stock issued upon
                exercise thereof; stock options, or rights to purchase up to
                12,760,900 shares of Common Stock available for issuance to
                officers, directors and employees of the Company at not less
                than fair market value, including stock options outstanding as
                of December 28, 1999 and Common Stock issued upon exercise
                thereof) for consideration less than the Exercise Price of the
                Warrant on the date of issuance of such securities; (iii)
                subdivide or reclassify its outstanding shares of Common Stock
                into a greater number of shares, or (iv) combine or reclassify
                its outstanding shares of Common Stock into a smaller number of
                shares, the Exercise Price in effect at the time of the record
                date for such dividend or distribution, the sale of such
                securities or the effective date of such subdivision,
                combination or reclassification shall be proportionately
                adjusted as of the effective date of such event by multiplying
                such Exercise Price by a fraction, the denominator of which
                shall be the number of shares of Common Stock outstanding
                immediately following such event and the numerator of which
                shall be the number of shares of Common Stock outstanding
                immediately prior thereto. For example, if the Company declares
                a 2 for 1 stock distribution and the Exercise Price immediately
                prior to such event was $1.00 per share, the adjusted Exercise
                Price immediately after such event would be $.50 per share. Such
                adjustment shall be made successively whenever any event listed
                above shall occur.

                (2) Whenever the Exercise Price payable upon exercise of each
                Warrant is adjusted pursuant to subsection (A) above, the number
                of Warrant Shares purchasable upon exercise of the Warrant shall
                simultaneously be adjusted by multiplying the number of Warrant
                Shares issuable upon exercise of this Warrant by the Exercise
                Price in effect on the date hereof and dividing the product so
                obtained by the Exercise Price, as adjusted pursuant to
                subsection (1).

                (3) No adjustment in the Exercise Price shall be required unless
                such adjustment would require an increase or decrease of at
                least $.05 in such price; provided, however, that any
                adjustments which by reason of this subsection (f) (3) are not
                required to be made shall be carried forward and taken into
                account in any subsequent adjustment required to be made
                hereunder.

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                (4) Each computation required by this Section (f) for purposes
                of determine whether the Exercise Price shall be adjusted shall
                be performed by the Company's Chief Financial Officer on the
                basis of the Company's internally prepared unaudited financial
                statements. Such unaudited financial statements shall be
                accompanied by a certificate signed by the President and Chief
                Financial Officer certifying that such unaudited statements have
                been prepared in accordance with GAAP on a basis consistently
                applied and included all adjustments (consisting only of normal,
                recurring accruals) necessary for a fair presentation of the
                financial position and results of the Company as of the end each
                such period. Any dispute between a holder and the Company in
                regard to such a computation shall be referred to and decided by
                the Company's then engaged firm of independent certified public
                accountants, which shall be a firm of recognized national
                reputation (the "Accounting Firm") The computations of the
                Accounting Firm shall be final and binding on the Company and
                the Holder.

                (5) Whenever the Exercise Price is adjusted, as herein provided,
                the Company shall promptly cause a notice setting forth the
                adjusted Exercise Price and adjusted number of Warrant Shares
                issuable upon exercise of each Warrant to be mailed to the
                Holder, at its address appearing in the Warrant Register, and
                shall cause a certified copy thereof to be mailed to its
                transfer agent, if any.

                (6) All calculations under this Section (f) shall be made to the
                nearest cent or to the nearest Warrant Share, as the case may
                be.

                (7) In the event that at any time, as a result of an adjustment
                made pursuant to this Section (f) above, the Holder of this
                Warrant thereafter shall become entitled to receive any shares
                of the Company, other than Common Stock, thereafter the number
                of such other shares so receivable upon exercise of this Warrant
                shall be subject to adjustment from time to time in a manner and
                on terms as nearly equivalent as practicable to the provisions
                with respect to the Common Stock contained in subsection (A)
                above.

                (8) Irrespective of any adjustments in the Exercise Price or the
                number or kind of Warrant Shares purchasable upon exercise of
                this Warrant, Warrants theretofore or thereafter issued may
                continue to express the same price and number and kind of shares
                as are stated in the similar Warrants initially issuable
                pursuant to this Agreement.

        (g)     OFFICER'S CERTIFICATE. Whenever the Exercise Price shall be
adjusted as required by the provisions of the foregoing Section, the Company
shall forthwith file in the custody of its Secretary or an Assistant Secretary
at its principal office and with its stock transfer agent, if any, an officer's
certificate showing the adjusted Exercise Price determined as herein provided,
setting forth in reasonable detail the facts requiring such adjustment,
including a statement of the number of additional shares of Common Stock, if
any, and such other facts as shall be necessary to show the reason for and the
manner of computing such adjustment. Each

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such officer's certificate shall be made available at all reasonable times for
inspection by the Holder or any holder of a Warrant executed and/or delivered
pursuant to Section (a) or Section (d), and the Company shall, forthwith after
each such adjustment, mail, by certified mail, a copy of such certificate to the
Holder or any such holder.

        (h)     NOTICES TO WARRANT HOLDERS. So long as this Warrant shall be
outstanding, (i) if the Company shall pay any dividend or make any distribution
upon the Common Stock, or (ii) if the Company shall offer to the holders of
Common Stock for subscription or purchase by them any shares of any class or any
other rights, or (iii) if any capital reorganization of the Company,
reclassification of the capital stock of the Company, consolidation or merger of
the Company with or into another corporation, sale, lease or transfer of all or
substantially all of the property and assets of the Company to another
corporation, or voluntary or involuntary dissolution, liquidation or winding up
of the Company shall be effected, then in any such case, the Company shall cause
to be mailed by certified mail to the Holder or any holder of a Warrant executed
and/or delivered pursuant to Section (a) or Section (d), at least 15 days prior
to the date specified in (x) or (y) below, as the case may be, a notice
containing a brief description of the proposed action and stating the date on
which (x) a record is to be taken for the purpose of such dividend, distribution
or rights, or (y) such reclassification, reorganization, consolidation, merger,
conveyance, lease, dissolution, liquidation or winding up is to take place and
the date, if any is to be fixed, as of which the holders of Common Stock or
other securities shall receive cash or other property deliverable upon such
reclassification, reorganization, consolidation, merger, conveyance,
dissolution, liquidation or winding up.

        (i)     RECLASSIFICATION, REORGANIZATION OR MERGER. In case of any
reclassification or capital reorganization of outstanding shares of Common Stock
of the Company, or in case of any consolidation or merger of the Company with or
into another corporation (other than a merger with another corporation in which
merger the Company is the continuing corporation and which does not result in
any reclassification or capital reorganization of outstanding shares of Common
Stock of the class issuable upon exercise of this Warrant) or in case of any
sale, lease or conveyance to another corporation of the property of the Company
as an entirety, the Company shall, as a condition precedent to such transaction,
cause effective provisions to be made so that the Holder or any holder of a
Warrant executed and/or delivered pursuant to Section (a) or Section (d) shall
have the right thereafter by exercising the Warrant at any time prior to the
expiration of the Warrant, to purchase the kind and amount of shares of stock
and other securities and property receivable upon such reclassification or
capital reorganization and consolidation, merger, sale or conveyance. Any such
provision shall include provision for adjustments which shall be as nearly
equivalent as may be practicable to the adjustments provided for in the Warrant.
The foregoing provisions of this Section (i) shall similarly apply to successive
reclassifications or capital reorganizations of shares of Common Stock and to
successive consolidations, mergers, sales or conveyances. In the event that in
connection with any such capital reorganization or reclassification,
consolidation, merger, sale or conveyance, additional shares of Common Stock
shall be issued in exchange, conversion, substitution or payment, in whole or in
part, for a security of the Company other than Common Stock, any such issue
shall be treated as an issue of Common Stock covered by the provisions of
subsection (1) of Section (f) hereof.

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        (j)     SECURITIES LAW COMPLIANCE

                        (1) The Holder of the Warrant, by acceptance hereof,
                        acknowledges that the Warrant and the shares of Common
                        Stock to be issued upon exercise hereof or conversion
                        thereof are being acquired solely for the Holder's own
                        account and not as a nominee for any other party, and
                        for investment, and that the Holder will not offer,
                        sell, transfer, assign or otherwise dispose of this
                        Warrant or any shares of Common Stock to be issued upon
                        exercise hereof or conversion thereof except under
                        circumstances that will not result in a violation of the
                        Act or any state securities laws. Upon exercise of the
                        Warrant, the Holder shall, if requested by the Company,
                        confirm in writing, in a form satisfactory to the
                        Company, that the shares of Common Stock so purchased
                        are being acquired solely for the Holder's own account
                        and not as a nominee for any other party, for
                        investment, and not with a view toward distribution or
                        resale.

                        (2) If appropriate, the Warrant and any Warrants issued
                        upon exercise or substitution or upon assignment or
                        transfer pursuant to Section (a) or Section (d), as the
                        case may be, and all shares of Common Stock issued upon
                        exercise hereof or conversion thereof shall be stamped
                        or imprinted with legends setting forth the restrictions
                        on transfer arising under applicable federal and state
                        securities laws.

        (k)     REGISTRATION RIGHTS UNDER THE SECURITIES ACT OF 1933

                        (1) Commencing the date hereof, the Company shall advise
                        the Holder of the Warrant or of the Warrant Shares or
                        any then Holder of Warrants or Warrant Shares (such
                        persons being collectively referred to herein as
                        "Holders") by written notice at least 21 days prior to
                        the filing of any registration statement or
                        post-effective amendment thereto ("Registration
                        Statement") under the Securities Act of 1933, as amended
                        (the "Act"), covering an underwritten public offering of
                        equity securities of the Company and, subject to the
                        provisions herein contained, shall register in any such
                        Registration Statement the number of Warrant Shares that
                        the Holder shall notify the Company it desires to
                        register and shall include in any such Registration
                        Statement such information as may be required to permit
                        a public offering of such Warrant Shares by the
                        Company's underwriter(s). The Company shall supply
                        prospectuses and other documents as the Holder may
                        reasonably request in order to facilitate the public
                        sale or other disposition of the Warrant Shares. The
                        Company shall bear the entire cost and expense of a
                        registration of securities initiated by it under this
                        Paragraph (1), except that the Holder shall, however,
                        bear the fees of its own counsel and any transfer taxes
                        and underwriting discounts or commissions applicable to
                        the Warrant Shares sold by it. The Company may include
                        other securities in any such

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                        registration statement. The Company shall do any and all
                        other acts and things which may be necessary or
                        desirable to enable the Holder to consummate the public
                        sale or other disposition of the Warrant Shares, and
                        furnish indemnification in the manner as set forth in
                        Paragraph (2) (a) of this Section (k), but shall not be
                        required to qualify as a foreign corporation to qualify
                        the Warrant Shares for sale under the securities laws of
                        any state. The Holder shall furnish information and
                        indemnification as set forth in Paragraph (2) (b) of
                        this Section (k). All decisions as to whether and when
                        to proceed with any Registration Statement shall be made
                        solely by the Company.

                                Nothwithstanding the foregoing paragraph, in the
                        event that there is an underwritten offering of the
                        Company's securities offered pursuant to said
                        registration statement pursuant to the immediately
                        preceding Paragraph, the underwriter(s) shall have the
                        right to refuse to permit any Warrant Shares, or to
                        limit the amount of Warrant Shares, to be sold by the
                        Holder to such underwriter(s) as such underwriter(s) may
                        determine in its discretion, and the Holder shall
                        refrain from selling such remainder of its Warrant
                        Shares covered by such registration statement for the
                        period of 180 days following the effective date and
                        shall also refrain at any time when notified by the
                        Company that an amendment or supplement to the
                        prospectus is required. The Company shall not be
                        obligated to keep any Registration Statement effective
                        for a total of more than 90 days.

                        (2) (a) Whenever pursuant to this Section (k) a
                        Registration Statement relating to the Warrant Shares is
                        filed under the Act, amended or supplemented, the
                        Company will indemnify and hold harmless each Holder of
                        Warrant Shares covered by such Registration Statement,
                        amendment or supplement (such Holder being hereinafter
                        called the "Distributing Holder"), and each person, if
                        any who controls (within the meaning of the Act) the
                        Distributing Holder, against any losses, claims, damages
                        or liabilities, joint or several, to which the
                        Distributing Holder or any such controlling person may
                        become subject, under the Act or otherwise, insofar as
                        such losses, claims, damages or liabilities (or actions
                        in respect thereof) arise out of or are based upon any
                        untrue statement or alleged untrue statement of any
                        material fact contained in any such Registration
                        Statement or any preliminary prospectus or final
                        prospectus constituting a part thereof or any amendment
                        or supplement thereto, or arise out of or are based upon
                        the omission to state therein a material fact required
                        to be stated therein or necessary to make the statements
                        therein not misleading; and will reimburse the
                        Distributing Holder and each such controlling person for
                        any legal or other expenses reasonably incurred by the
                        Distributing Holder and each controlling person for any
                        legal or other expenses reasonable incurred by the
                        Distributing Holder or such controlling person or
                        underwriter in connection with investigating or

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                        defending any such loss, claim, damage, liability or
                        action; provided, however, that the Company will not be
                        liable in any such case to the extent that any such
                        loss, claim, damage or liability arises out of or is
                        based upon an untrue statement or alleged untrue
                        statement or omission or alleged omission made in said
                        Registration Statement, preliminary prospectus, final
                        prospectus or amendment or supplement, in reliance upon
                        and in conformity with written information furnished by
                        the Distributing Holder or underwriter for use in the
                        preparation thereof.

                                (b) The Distributing Holder will indemnify and
                        hold harmless the Company, each of its directors, each
                        of its officers who have signed said Registration
                        Statement and such amendments and supplements thereto,
                        each person, if any, who controls the Company (within
                        the meaning of the Act) and the Company's underwriter(s)
                        and each person, if any, who controls such
                        underwriter(s) (within the meaning of the Act) against
                        any losses, claims, damages or liabilities to which the
                        Company or any such director, officer, underwriter or
                        controlling person may become subject, under the Act or
                        otherwise, insofar as such losses, claims, damages or
                        liabilities arise out of or are based upon any untrue or
                        alleged untrue statement of any material fact contained
                        in said Registration Statement, preliminary prospectus,
                        final prospectus, or amendment or supplement, or arise
                        out of or are based upon the omission or the alleged
                        omission to state therein a material fact required to be
                        stated therein or necessary to make the statements
                        therein not misleading, in each case to the extent, but
                        only to the extent that such untrue statement or alleged
                        untrue statement or omission or alleged omission was
                        made in said Registration Statement, preliminary
                        prospectus, final prospectus or amendment or supplement,
                        in reliance upon and in conformity with written
                        information furnished by such Distributing Holder for
                        use in the preparation thereof; and will reimburse the
                        Company or underwriter or any such director, officer or
                        controlling person for any legal or other expenses
                        reasonably incurred by them in connection with
                        investigating or defending any such loss, claim, damage,
                        liability or action.

                                (c) Promptly after receipt by an indemnified
                        party under this Paragraph 2 of notice of the
                        commencement of any action, such indemnified party will,
                        if a claim in respect thereof is to be made against any
                        indemnifying party, give the indemnifying party notice
                        of the commencement thereof; but the omission so to
                        notify the indemnifying party will not relieve it from
                        any liability which it may have to any indemnified party
                        otherwise than under this Paragraph 2.

                                (d) In case any such action is brought against
                        any indemnified party, and it notifies an indemnifying
                        party of the commencement thereof, the indemnifying
                        party will be entitled to participate in, and, the
                        extent

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                        that it may wish, jointly with any other indemnifying
                        party similarly notified to assume the defense thereof,
                        with counsel reasonably satisfactory to such indemnified
                        party, and after notice from the indemnifying party to
                        such indemnified party of its election so to assume the
                        defense thereof, the indemnifying party will not be
                        liable to such indemnified party under this Paragraph 2
                        for any legal or other expenses subsequently incurred by
                        such indemnified party in connection with the defense
                        thereof other than reasonable costs of investigation.

                                (e) The Company's agreements with respect to
                        Warrant Shares in this Section (k) shall continue in
                        effect regardless of the exercise or surrender of the
                        Warrant.

                (l)     RIGHT TO CONVERT WARRANT INTO COMMON STOCK.

                        (1) Right to Convert. The Holder shall have the right to
                        require the Company to convert this Warrant provided in
                        this Section (l), into common stock (the "Net Conversion
                        Right"). Upon exercise of the Net Conversion Right, the
                        Company shall deliver to the Holder (without payment by
                        the Holder of any Exercise Price or of any other cash or
                        consideration) that number of shares of Common Stock
                        equal to the quotient obtained by dividing (x) the value
                        of this Warrant at the time the Conversion Right is
                        exercised (determined by subtracting the aggregate
                        Exercise Price in effect immediately prior to the
                        exercise of the Conversion Right from the aggregate fair
                        market value of the shares of Common Stock issuable upon
                        exercise of this Warrant immediately prior to the
                        exercise of the Conversion Right) by (y) the fair market
                        value of one share of Common Stock immediately prior to
                        the exercise of the Conversion Right.

                        (2) Method of Exercise. The Net Conversion Right may be
                        exercised by the Holder by the surrender of this Warrant
                        at the principal office of the Company together with a
                        written statement specifying that the Holder thereby
                        intends to exercise the Net Conversion Right.
                        Certificates for the shares of Common Stock issuable
                        upon exercise of the Net Conversion Right shall be
                        delivered to the Holder within five (5) days following
                        the Company's receipt of this Warrant together with the
                        aforesaid written statement.

                        (3) Determination of Fair Market Value. For purposes of
                        this Section (f), fair market value of a share of Common
                        Stock as of a particular date (the "Determination Date")
                        shall be determined in accordance with Section (c) of
                        this Warrant.

        (m)     AMENDMENTS. Neither the Warrant nor any term hereof may be
changed, waived, discharged or terminated without the prior written consent of
the Holder.

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        (n)     NO IMPAIRMENT. The Company will not avoid or seek to avoid the
observance or performance of any of the terms to be observed or performed
hereunder by the Company, but will at all times in good faith assist in the
carrying out of all the provisions of this Warrant and in the taking of all such
action as may be necessary or appropriate in order to protect the rights of any
Holder. Without limiting the generality of the foregoing, the Company: (i) will
not set nor increase the par value of any Warrant Shares above the amount
payable therefor upon such exercise, and (ii) will take all actions that are
necessary or appropriate in order that the Company may validly and legally issue
fully paid and nonassessable Warrant Shares upon the exercise of the Warrants.

        (o)     GOVERNING LAW. This Agreement shall be governed by and construed
under the laws of the State of Delaware.

        (p)     NOTICES. All notices and other communications required or
permitted hereunder shall be in writing and shall be mailed by first class mail,
postage prepaid, addressed (a) if to the Holder, to BT Alex. Incorporated, 1
South Street, Baltimore, Maryland 21202, Attention: Geoffrey Stengel III, or (b)
if to the Company, to ENTERWORKS, Inc. 19886 Ashburn Road, Ashburn, VA 20147, or
at such other address as to the Company shall have furnished to the Holder in
writing.

        (q)     REPRESENTATIONS AND WARRANTIES OF THE COMPANY. The Company
represents and warrants to Holder that:

                (a)     Organization, Standing and Qualification. The Company is
a corporation duly organization, validly existing and in good standing under the
laws of the State of Delaware; has all requisite corporate power and authority
to own or lease and operate its properties and to carry on its business as now
conducted; and is duly qualified or licensed to do business as a foreign
corporation in good standing in all jurisdictions in which it owns or leases
property or in which the conduct of its business requires it to so qualify or be
licensed.

                (b)     Authority and Noncontravention. The Company has all
requisite power and authority to enter into and perform all of its obligations
under this Warrant and to carry out the transactions contemplated hereby. The
Company has taken all corporate or stockholder actions necessary to authorize it
to enter into and perform all of its obligations under this Warrant and to
consummate the transactions contemplated hereby. The execution and delivery of
this Warrant does not, and the consummation of the transactions contemplated
hereby and compliance with the provisions hereof will not, conflict with, or
result in any violation of, or default (with or without notice or lapse of time,
or both) under, or give rise to a right of termination, cancellation or
acceleration of any obligation or loss of a benefit under, or result in the
creation of any lien upon any of the properties or assets of the Company or any
of its subsidiaries under, (i) any of their organizational documents, (ii) any
loan or credit agreement, note, bond, mortgage, indenture, guarantee, lease,
agreement or other instrument, permit, concession, franchise, license or similar
authorization application to the Company or any of its subsidiaries or their
respective properties or assets or (iii) any judgment, order, decree, statute,

                                     - 11 -
<PAGE>   12

law, ordinance, rule or regulation applicable to the Company or any of its
subsidiaries or their respective properties or assets.

                (c)     Validity. This Warrant is the legal, valid and binding
obligation of the company, enforceable in accordance with its terms, except as
enforceability may be limited by bankruptcy, insolvency, reorganization,
moratorium and other similar laws affecting the rights of creditors generally.

                (d)     No Brokers. There are no valid claims for brokerage
commissions, finder's fees or similar sales compensation in connection with this
Warrant based upon any arrangement or agreement made by or on behalf of the
Company, and the Company agrees to indemnify and hold harmless any holder of
this Warrant against any liability or expense to it arising out of such a claim
to the extent that such claim arises out of actions or alleged actions of the
Company.

                (e)     Indemnity. The Company agrees to indemnify and hold
harmless the holder of this Warrant and any affiliates, employees and agents of
the holder of this Warrant against any and all loss, liability, claim, damage,
and expense whatsoever (including, but not limited to, any and all expenses
whatsoever, including the fees and disbursements of counsel, reasonably incurred
in investigating, preparing, or defending against any litigation commenced or
threatened or any claim whatsoever), arising out of or based upon any breach or
failure by the Company to comply with any representation, warranty, covenant, or
agreement made by the Company herein.

        IN WITNESS WHEREOF, __________ ENTERWORKS, Inc. has caused this Warrant
to be executed by its officer thereunto duly authorized.

Dated:  December __, 1999

                                            COMPANY:  ENTERWORKS, INC.

                                            By:
                                                ---------------------------
                                            Name:
                                                  -------------------------
                                            Title:
                                                   ------------------------

                                     - 12 -
<PAGE>   13

                                  PURCHASE FORM

                                         Dated _______________, 19___

        The undersigned hereby irrevocably elects to exercise its rights
pursuant to this Warrant to the extent of purchasing ______ shares of Common
Stock of Enterworks, Inc., and hereby makes payment of $1.15, in cash, in
payment of the exercise price thereof.

        [The undersigned hereby irrevocably elects to exercise its rights
pursuant to this Warrant to the extent of purchasing _____ shares of Common
Stock and hereby authorizes you to deliver such shares of Common Stock for sale
to ___________, and to retain from the proceeds of such sale $__________, in
cash, in payment of the exercise price thereof and to remit to the undersigned
the balance of such proceeds.]

                                -----------------

                     INSTRUCTIONS FOR REGISTRATION OF STOCK

Name
    -------------------------------------------------------------
           (Please typewrite or print in block letters)

Address
       ----------------------------------------------------------

Signature
         --------------------------------------------------------

                                     - 13 -
<PAGE>   14

                                 ASSIGNMENT FORM

        FOR VALUE RECEIVED, _________________________________________ hereby
sells, assigns and transfers unto

Name
    --------------------------------------------------------------
                  (Please typewrite or print in block letters)

Address
       -----------------------------------------------------------

the right to purchase Common Stock of __________ _________________ (the
"Company"), represented by this Warrant to the extent of ____ ______ shares as
to which such right is exercisable and does hereby irrevocably constitute and
appoint _____________________________ as Attorney, to transfer the same on the
books of the Company with full power of substitution in the premises.

Date ___________, 19___

Signature
         --------------------------

                                     - 14 -<PAGE>   1
                                                                   EXHIBIT 10.20

THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER
THE SECURITIES ACT OF 1933 OR APPLICABLE STATE SECURITIES LAWS AND MAY NOT BE
SOLD, TRANSFERRED OR ASSIGNED UNLESS IT IS SO REGISTERED OR AN EXEMPTION FROM
REGISTRATION IS AVAILABLE UNDER SAID ACT AND LAWS. THIS NOTE IS SUBORDINATE AND
JUNIOR IN RIGHT OF PAYMENT TO SENIOR INDEBTEDNESS DUE TO NATIONSBANK, N.A.
AND/OR CERTAIN OTHER BANKS OR FINANCIAL INSTITUTIONS, AS PROVIDED IN THE
SUBORDINATION AGREEMENT DATED AS OF JULY 12, 1996 BY AND AMONG ENTERWORKS.COM,
INC., A DELAWARE CORPORATION, TELOS CORPORATION, A MARYLAND CORPORATION,
NATIONSBANK, N.A. AND THE HOLDERS IDENTIFIED IN SCHEDULE A THERETO.

                              ENTERWORKS.COM, INC.
                             CAPITAL STOCK PURCHASE
                                SERIES A WARRANT

       This certifies that, for value received,________________________________,
_______________________________________________________ is entitled to purchase
and receive from enterWorks.com, inc. (the "Company"), during the period
hereinafter provided, _________________ fully paid and non-assessable shares of
the $.01 parvalue common voting stock of the Company (the "Capital Stock" or
"Common Stock") upon surrender hereof, at the principal office of the Company
in Ashburn, Virginia, and simultaneous payment of the purchase price of $1.00
for each share of the Capital Stock so to be purchased; such number of shares
and such purchase price per share being subject, however, to adjustment as
hereinafter provided. The purchase price per share, as adjusted from time to
time, is hereinafter referred to as the "Purchase Price."

       This Warrant shall be exercisable commencing July 12, 1996, that being
the issuance date of that certain Series A Senior Subordinated Unsecured Note
Due July 11, 2001, issued by the Company to the Holder of this Series A Warrant,
and shall expire on July 11, 2006.

       1.     Purchase Price Adjustments.

              a.     General. The Purchase Price shall be subject to adjustment
from time to time pursuant to the terms of this Section 1.

              b.     Diluting Issuances.

                     (1)    Special Definitions. For purposes of this Subsection
1b, the following definitions shall apply:

                            (A)    "Option" shall mean rights, options or
warrants to subscribe for, purchase or otherwise acquire Common Stock or
Convertible Securities, excluding options to acquire shares described in clauses
(i) or (ii) of subsection 1b(1)(D) below.

                            (B)    "Original Issue Date" shall mean the date on
which this Warrant was first issued.

                            (C)    "Convertible Securities" shall mean any
evidences of indebtedness, shares or other securities directly or indirectly
convertible into or exchangeable for Common Stock.

<PAGE>   2

                            (D)    "Additional Shares of Common Stock" shall
mean all shares of Common Stock issued (or, pursuant to Subsection 1b(2) below,
deemed to be issued) by the Company after the Original Issue Date, other than
shares of Common Stock issued or issuable:

                                   (i)    by reason of a dividend, stock split,
split-up or other distribution on shares of Common Stock that are excluded from
the definition of Additional Shares of Common Stock by this clause; or

                                   (ii)   to employees or directors of, or
consultants to, the Company pursuant to a plan adopted by the Board of Directors
of the Company;

                     (2)    No Adjustment of Purchase Price. No adjustments to
the Purchase Price shall be made unless the consideration per share (determined
pursuant to Subsection 1b(5)) for an Additional Share of Common Stock issued or
deemed to be issued by the Company is less than the Purchase Price in effect on
the date of, and immediately prior to, the issue of such Additional Shares.

                     (3)    Issue of Securities Deemed Issue of Additional
Shares of Common Stock. If the Company at any time or from time to time after
the Original Issue Date shall issue any Options or Convertible Securities or
shall fix a record date for the determination of holders of any class of
securities entitled to receive any such Options or Convertible Securities, then
the maximum number of shares of Common Stock (as set forth in the instrument
relating thereto without regard to any provision contained therein for a
subsequent adjustment of such number ) issuable upon the exercise of such
Options or, in the case of Convertible Securities and Options therefor, the
conversion or exchange of such Convertible Securities, shall be deemed to be
Additional Shares of Common Stock issued as of the time of such issue or, in
case such a record date shall have been fixed, as of the close of business on
such record date, provided that Additional Shares of Common Stock shall not be
deemed to have been issued unless the consideration per share (determined
pursuant to Subsection 1b(5) hereof) of such Additional Shares of Common Stock
would be less than the Purchase Price in effect on the date of and immediately
prior to such issue, or such record date, as the case may be, and provided
further that in any such case in which Additional Shares of Common Stock are
deemed to be issued:

                            (A)    No further adjustment in the Purchase Price
shall be made upon the subsequent issue of Convertible Securities or shares of
Common Stock upon the exercise of such Options or conversion or exchange of such
Convertible Securities;

                            (B)    If such Options or Convertible Securities by
their terms provide, with the passage of time or otherwise, for any increase in
the consideration payable to the Company, upon the exercise, conversion or
exchange thereof, the Purchase Price computed upon the original issue thereof
(or upon the occurrence of a record date with respect thereto), and any
subsequent adjustments based thereon, shall, upon any such increase becoming
effective, be recomputed to reflect such increase insofar as it affects such
Options or the rights of conversion or exchange under such Convertible
Securities;

                            (C)    Upon the expiration or termination of any
unexercised Option, the Purchase Price shall not be readjusted, but the
Additional Shares of Common Stock deemed issued as the result of the original
issue of such Option shall not be deemed issued for purposes of any subsequent
adjustment of the Purchase Price;

                            (D)    In the event of any change in the number of
shares of Common Stock issuable upon the exercise, conversion or exchange of any
Option or Convertible Security,

                                       2
<PAGE>   3

including, but not limited to, a change resulting from the anti-dilution
provisions thereof, the Purchase Price then in effect shall forthwith be
readjusted to such Purchase Price as would have obtained had the adjustment
which was made upon the issuance of such Option or Convertible Security not
exercised or converted prior to such change been made upon the basis of such
change; and

                            (E)    No readjustment pursuant to Clause (B) or (D)
above shall have the effect of increasing the Purchase Price to an amount which
exceeds the lower of (i) the Purchase Price on the original adjustment date, or
(ii) the Purchase Price that would have resulted from any issuances of
Additional Shares of Common Stock between the original adjustment date and such
readjustment date.

                     (4)    Adjustment of Purchase Price Upon Issuance of
Additional Shares of Common Stock. In the event the Company shall at any time
after the Original Issue Date issue Additional Shares of Common Stock (including
Additional Shares of Common Stock deemed to be issued pursuant to Subsection
1b(3), but excluding shares issued as a dividend or distribution or upon a stock
split or combination as provided in Subsection 1c), without consideration or for
a consideration per share less than the Purchase Price in effect on the date of
and immediately prior to such issue, then and in such event, such Purchase Price
shall be reduced, concurrently with such issue, to a price (calculated to the
nearest cent) determined by multiplying such Purchase Price by a fraction, (A)
the numerator of which shall be (1) the number of shares of Common Stock
outstanding immediately prior to such issue plus (2) the number of shares of
Common Stock which the aggregate consideration received or to be received by the
Company for the total number of Additional Shares of Common Stock so issued
would purchase at such Purchase Price; and (B) the denominator of which shall be
the number of shares of Common Stock outstanding immediately prior to such issue
plus the number of such Additional Shares of Common Stock so issued; provided
that, (i) for the purpose of this Subsection 1b(4), all shares of Common Stock
issuable upon exercise or conversion of Options or Convertible Securities
outstanding (other than shares excluded from the definition of "Additional
Shares of Common Stock" by virtue of Clause (ii) of subsection 1b(1)(D)), and
(ii) the number of shares of Common Stock deemed issuable upon the conversion of
such outstanding Options and Convertible Securities shall not give effect to any
adjustments to the conversion price or conversion rate of such Option or
Convertible Security resulting from the issuance of Additional Shares of Common
Stock that is the subject of this calculation.

                     Notwithstanding the foregoing, the applicable Purchase
Price shall not be so reduced at such time if the amount of such reduction would
be an amount less than $.05, but any such amount shall be carried forward and
reduction with respect thereto made at the time of and together with any
subsequent reduction which, together with such amount and any other amount or
amounts so carried forward, shall aggregate $.05 or more.

                     (5)    Determination of Consideration. For purposes of this
Subsection 1b, the consideration received by the Company for the issue of any
Additional Shares of Common Stock shall be computed as follows:

                            (A)    Cash and Property: Such consideration shall:

                                   (i)    insofar as it consists of cash, be
computed at the aggregate of cash received by the Company, excluding amounts
paid or payable for accrued interest or accrued dividends;

                                       3
<PAGE>   4

                                   (ii)   insofar as it consists of property
other than cash, be computed at the fair market value thereof at the time of
such issue, as determined in good faith by the Board of Directors; and

                                   (iii)  in the event Additional Shares of
Common Stock are issued together with other shares or securities or other assets
of the Company for consideration which covers both, be the proportion of such
consideration so received, computed as provided in Clauses (i) and (ii) above,
as determined in good faith by the Board of Directors.

                            (B)    Options and Convertible Securities. The
consideration per share received by the Company for Additional Shares of Common
Stock deemed to have been issued pursuant to Subsection 1b(3), relating to
Options and Convertible Securities, shall be determined by dividing

                                   (x)    the total amount, if any, received or
receivable by the Company as consideration for the issue of such Options or
Convertible Securities, plus the minimum aggregate amount of additional
consideration (as set forth in the instruments relating thereto, without regard
to any provision contained therein for a subsequent adjustment of such
consideration) payable to the Company upon the exercise of such Options or the
conversion or exchange of Convertible Securities, or in the case of Options for
Convertible Securities, the exercise of such Options for Convertible Securities
and the conversion or exchange of such Convertible Securities, by

                                   (y)    the maximum number of shares of Common
Stock (as set forth in the instruments relating thereto, without regard to any
provision contained therein for a subsequent adjustment of such number) issuable
upon the exercise of such Options or the conversion or exchange of such
Convertible Securities.

                     (6)    Multiple Closing Dates. In the event the Company
shall issue on more than one date Additional Shares of Common Stock which are
comprised of shares of the same series or class of Preferred Stock, and such
issuance dates occur within a period of no more than 120 days, then the Purchase
Price shall be adjusted only once on account of such issuances, with such
adjustment to occur upon the final such issuance and to give effect to all such
issuances as if they occurred on the date of the final such issuance.

              c.     Recapitalizations. If outstanding shares of the Company's
Common Stock shall be subdivided into a greater number of shares or a dividend
in Common Stock shall be paid in respect of Common Stock, the Purchase Price in
effect immediately prior to such subdivision or at the record date of such
dividend shall simultaneously with the effectiveness of such subdivision or
immediately after the record date of such dividend be proportionately reduced.
If outstanding shares of Common Stock shall be combined into a smaller number of
shares, the Purchase Price in effect immediately prior to such combination
shall, simultaneously with the effectiveness of such combination, be
proportionately increased.

              d.     Mergers, etc. If there shall occur any capital
reorganization or reclassification of the Company's Common Stock (other than a
change in par value or a subdivision or combination as provided for in
Subsection 1c, above), or any consolidation or merger of the Company with or
into another corporation, or a transfer of all or substantially all of the
assets of the Company, then, as part of any such reorganization,
reclassification, consolidation, merger or sale, as the case may be, lawful
provision shall be made so that the Registered Holder of this Warrant shall have
the right thereafter to receive upon the exercise hereof the kind and amount of
shares of stock or other securities or property which such Registered Holder
would have been entitled to receive if, immediately prior to any such
reorganization, reclassification, consolidation, merger or sale, as the case may
be, such Registered Holder had held the number of shares of Common Stock which
were then purchasable upon the exercise of this Warrant. In any such case,
appropriate adjustment (as reasonably determined in good faith by the Board of
Directors of the Company) shall be made in the application of the provisions
set forth herein with respect to the rights and interests thereafter of the
Registered Holder of this Warrant, such that the provisions

                                       4
<PAGE>   5

set forth in this Section 1 (including provisions with respect to adjustment of
the Purchase Price) shall thereafter be applicable, as nearly as is reasonably
practicable, in relation to any shares of stock or other securities or property
thereafter deliverable upon the exercise of this Warrant.

              e.     Certificate of Adjustment. When any adjustment is required
to be made pursuant to this Section 1, the Company shall promptly mail to the
Registered Holder a certificate setting forth the Purchase Price after such
adjustment and setting forth a brief statement of the facts requiring such
adjustment. Such certificate shall also set forth the kind and amount of stock
or other securities or property into which this Warrant shall be exercisable
following such adjustment.

       2.     Registration Rights.

              a.     Certain Definitions. As used in this Warrant, the following
terms shall have the following respective meanings:

              "Commission" means the Securities and Exchange Commission, or any
other Federal agency at the time administering the Securities Act.

              "Capital Stock" or "Common Stock" means the common stock, $.01 par
value per share, of the Company.

              "Exchange Act" means the Securities Exchange Act of 1934, as
amended, or any similar Federal statute, and the rules and regulations of the
Commission issued under such Act, as they each may, from time to time, be in
effect.

              "Registration Statement" means a registration statement filed by
the Company with the Commission for a public offering and sale of Common Stock
(other than a registration statement on Form S-8 or Form S-4, or their
successors, or any other form for a similar limited purpose, or any registration
statement covering only securities proposed to be issued in exchange for
securities or assets of another corporation).

              "Registration Expenses" means the expenses described in Subsection
e.

              "Registrable Shares" means the shares of Common Stock issued or
issuable upon exercise of this Warrant or other Series A Warrants issued
contemporaneously; provided, however, that shares of Common Stock which are
Registrable Shares shall cease to be Registrable Shares upon any sale of such
Registrable Shares pursuant to a Registration Statement or Rule 144 under the
Securities Act. Wherever reference is made in this Warrant to a request or
consent of holders of a certain percentage of Registrable Shares, the
determination of such percentage shall include shares of Common Stock issuable
upon exercise of the Warrant even if such exercise conversion has not yet been
effected.

              "Securities Act" means the Securities Act of 1933, as amended, or
any similar Federal statute, and the rules and regulations of the Commission
issued under such Act, as they each may, from time to time, be in effect.

              "Stockholders" means the Holders and any persons or entities to
whom the rights granted under this Warrant are transferred by any Holders, their
successors or assigns pursuant to Section 4 hereof.

       b.     Required Registrations.

                     (1)    At any time after the Company becomes eligible to
file a Registration Statement on Form S-3 (or any successor form relating to
secondary offerings), a Stockholder or Stockholders holding in the aggregate at
least 20% of the Registrable Shares issued pursuant to the Series A Warrants may
request the Company, in writing, to effect the registration on Form S-3 (or such
successor form), of Registrable Shares having an aggregate offering price of at
least Five Hundred Thousand Dollars ($500,000) (based on the then current public
market price). Upon receipt of any such request, the Company shall promptly give
written notice of such proposed registration to all Stockholders. Such
Stockholders shall have the right, by giving written notice to the Company

                                       5
<PAGE>   6

within 30 days after the Company provides its notice, to elect to have included
in such registration such of their Registrable Shares as such Stockholders may
request in such notice of election; provided that if the underwriter (if any)
managing the offering determines that, because of marketing factors, all of the
Registrable Shares requested to be registered by all Stockholders may not be
included in the offering, then all Stockholders who have requested registration
shall participate in the registration pro rata based upon the number of
Registrable Shares which they have requested to be so registered. Thereupon, the
Company shall, as expeditiously as possible, use its best efforts to effect the
registration on Form S-3 (or such successor form) of all Registrable Shares
which the Company has been requested to so register.

                     (2)    The Company shall not be required to effect more
than 3 registrations pursuant to Subparagraph (1) above nor within six months
after the effective date of any other Registration Statement of the Company
(other than on Form S-3, or S-8, or any successor form).

                     (3)    If at the time of any request to register
Registrable Shares pursuant to this Subsection b, the Company is engaged or has
fixed plans to engage within 30 days of the time of the request in a registered
public offering as to which the Stockholders may include Registrable Shares
pursuant to Subsection c or is engaged in any other activity which, in the good
faith determination of the Company's Board of Directors, would be adversely
affected by the requested registration to the material detriment of the Company,
then the Company may at its option direct that such request be delayed for a
period not in excess of six months from the effective date of such offering or
the date of commencement of such other material activity, as the case may be.

              c.     Incidental Registration.

                     (1)    Whenever the Company proposes to file a Registration
Statement (other than pursuant to Subsection b(2)) at any time and from time to
time, it will, prior to such filing, give written notice to all Stockholders of
its intention to do so and, upon the written request of a Stockholder or
Stockholders given within 20 days after the Company provides such notice (which
request shall state the intended method of disposition of such Registrable
Shares), the Company shall use its best efforts to cause all Registrable Shares
which the Company has been requested by such Stockholder or Stockholders to
register to be registered under the Securities Act to the extent necessary to
permit their sale or other disposition in accordance with the intended methods
of distribution specified in the request of such Stockholder or Stockholders;
provided that the Company shall have the right to postpone or withdraw any
registration effected pursuant to this Subsection c without obligation to any
Stockholder.

                     (2)    In connection with any registration under this
Subsection c involving an underwriting, the Company shall not be required to
include any Registrable Shares in such registration unless the holders thereof
accept the terms of the underwriting as agreed upon between the Company and the
underwriters selected by it (provided that such terms must be consistent with
this Warrant). If in the opinion of the managing underwriter it is appropriate
because of marketing factors to limit the number of Registrable Shares to be
included in the offering, then the Company shall be required to include in the
registration only that number of Registrable Shares, if any, which the managing
underwriter believes should be included therein. If the number of Registrable
Shares to be included in the offering in accordance with the foregoing is less
than the total number of shares which the holders of Registrable Shares have
requested to be included, then the holders of Registrable Shares who have
requested registration and other holders of securities entitled to include them
in such registration shall participate in the registration pro rata based upon
their total ownership of shares of Common Stock (giving effect to the conversion
into Common Stock of all securities convertible thereinto). If any holder would
thus be entitled to include more securities than such holder requested to be
registered, the excess shall be allocated among other requesting holders pro
rata in the manner described in the preceding sentence.

              d.     Registration Procedures. If and whenever the Company is
required by the provisions of this Warrant to use its best efforts to effect the
registration of any of the Registrable Shares under the Securities Act, the
Company shall:

                     (1)    file with the Commission a Registration Statement
with respect to such Registrable Shares and use its best efforts to cause that
Registration Statement to become and remain effective;

                                       6
<PAGE>   7

                     (2)    as expeditiously as possible prepare and file with
the Commission any amendments and supplements to the Registration Statement and
the prospectus included in the Registration Statement as may be necessary to
keep the Registration Statement effective, in the case of a firm commitment
underwritten public offering, until each underwriter has completed the
distribution of all securities purchased by it and, in the case of any other
offering, until the earlier of the sale of all Registrable Shares covered
thereby or 120 days after the effective date thereof;

                     (3)    as expeditiously as possible furnish to each selling
Stockholder such reasonable numbers of copies of the prospectus, including a
preliminary prospectus, in conformity with the requirements of the Securities
Act, and such other documents as the selling Stockholder may reasonably request
in order to facilitate the public sale or other disposition of the Registrable
Shares owned by the selling Stockholder; and

                     (4)    as expeditiously as possible use its best efforts to
register or qualify the Registrable Shares covered by the Registration Statement
under the securities or Blue Sky laws of such states as the selling Stockholders
shall reasonably request, and do any and all other acts and things that may be
necessary or desirable to enable the selling Stockholders to consummate the
public sale or other disposition in such states of the Registrable Shares owned
by the selling Stockholder; provided, however, that the Company shall not be
required in connection with this Subparagraph (4) to qualify as a foreign
corporation or execute a general consent to service of process in any
jurisdiction.

              If the Company has delivered preliminary or final prospectuses to
the selling Stockholders and after having done so the prospectus is amended to
comply with the requirements of the Securities Act, the Company shall promptly
notify the selling Stockholders and, if requested, the selling Stockholders
shall immediately cease making offers of Registrable Shares and return all
prospectuses to the Company. The Company shall promptly provide the selling
Stockholders with revised prospectuses and, following receipt of the revised
prospectuses, the selling Stockholders shall be free to resume making offers of
the Registrable Shares.

              e.     Allocation of Expenses. The Company will pay all
Registration Expenses of all registrations under this Warrant; provided,
however, that if a registration under Subsection b is withdrawn at the request
of the Stockholders requesting such registration (other than as a result of
information concerning the business or financial condition of the Company which
is made known to the Stockholders after the date on which such registration was
requested) and if the requesting Stockholders elect not to have such
registration counted as a registration requested under Subection b, the
requesting Stockholders shall pay the Registration Expenses of such registration
pro rata in accordance with the number of their Registrable Shares included in
such registration. For purposes of this Subsection e, the term "Registration
Expenses" shall mean all expenses incurred by the Company in complying with this
Warrant, including, without limitation, all registration and filing fees,
exchange listing fees, printing expenses, fees and expenses of counsel for the
Company and the fees and expenses of one counsel selected by the selling
Stockholders to represent the selling Stockholders, state Blue Sky fees and
expenses, and the expense of any special audits incident to or required by any
such registration, but excluding underwriting discounts, selling commissions and
the fees and expenses of selling Stockholders' own counsel (other than the
counsel selected to represent all selling Stockholders).

              f.     Indemnification and Contribution.

                     (1)    In the event of any registration of any of the
Registrable Shares under the Securities Act pursuant to this Warrant, the
Company will indemnify and hold harmless the seller of such Registrable Shares,
each underwriter of such Registrable Shares, and each other person, if any, who
controls such seller or underwriter within the meaning of the Securities Act or
the Exchange Act against any losses, claims, damages or liabilities, joint or
several, to which such seller, underwriter or controlling person may become
subject under the Securities Act, the Exchange Act, state securities or Blue Sky
laws or otherwise, insofar as such losses, claims, damages or liabilities (or
actions in respect thereof) arise out of or are based upon any untrue statement
or alleged untrue statement of any material fact contained in any Registration
Statement under which such Registrable Shares were registered under the
Securities Act, any preliminary prospectus or final prospectus contained in the
Registration Statement, or any amendment or supplement to such Registration
Statement, or arise out of or are based upon the omission or alleged omission to
state a material fact required to be stated therein or necessary to make the
statements therein not misleading; and the Company will reimburse such seller,
underwriter and each such controlling person for any legal or any other expenses
reasonably incurred by such seller,

                                       7
<PAGE>   8
underwriter or controlling person in connection with investigating or defending
any such loss, claim, damage, liability or action; provided, however, that the
Company will not be liable in any such case to the extent that any such loss,
claim, damage or liability arises out of or is based upon any untrue statement
or omission made in such Registration Statement, preliminary prospectus or final
prospectus, or any such amendment or supplement, in reliance upon and in
conformity with information furnished to the Company, in writing, by or on
behalf of such seller, underwriter or controlling person specifically for use
in the preparation thereof.

                     (2)    In the event of any registration of any of the
Registrable Shares under the Securities Act pursuant to this Warrant, each
seller of Registrable Shares, severally and not jointly, will indemnify and hold
harmless the Company, each of its directors and officers and each underwriter
(if any) and each person, if any, who controls the Company or any such
underwriter within the meaning of the Securities Act or the Exchange Act,
against any losses, claims, damages or liabilities, joint or several, to which
the Company, such directors and officers, underwriter or controlling person may
become subject under the Securities Act, Exchange Act, state securities or Blue
Sky laws or otherwise, insofar as such losses, claims, damages or liabilities
(or actions in respect thereof) arise out of or are based upon any untrue
statement of a material fact contained in any Registration Statement under which
such Registrable Shares were registered under the Securities Act, any
preliminary prospectus or final prospectus contained in the Registration
Statement, or any amendment or supplement to the Registration Statement, or
arise out of or are based upon any omission to state a material fact required to
be stated therein or necessary to make the statements therein not misleading, if
the statement or omission was made in reliance upon and in conformity with
information relating to such seller furnished in writing to the Company by or on
behalf of such seller specifically for use in connection with the preparation of
such Registration Statement, prospectus, amendment or supplement; provided,
however, that the obligations of such Stockholders hereunder shall be limited to
an amount equal to the proceeds to each Stockholder of Registrable Shares sold
in connection with such registration.

                     (3)    Each party entitled to indemnification under this
Subsection f (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 be
unreasonably withheld); and, provided, further, that the failure of any
Indemnified Party to give notice as provided herein shall not relieve the
Indemnifying Party of its obligations under this Subsection f. The Indemnified
Party may participate in such defense at such party's expense; provided,
however, that the Indemnifying Party shall pay such expense 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 the
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 of such claim or
litigation, and no Indemnified Party shall consent to entry of any judgment or
settle such claim or litigation without the prior written consent of the
Indemnifying Party.

                     (4)    In order to provide for just and equitable
contribution to joint liability under the Securities Act in any case in which
either (i) any holder of Registrable Shares exercising rights under this
Warrant, or any controlling person of any such holder, makes a claim for
indemnification pursuant to this Subsection f but it is judicially determined
(by the entry of a final judgment or decree by a court of competent jurisdiction
and the expiration of time to appeal or the denial of the last right of appeal)
that such indemnification may not be enforced in such case notwithstanding the
fact that this Subsection f provides for indemnification in such case, or (ii)
contribution under the Securities Act may be required on the part of any such
selling Stockholder or any such controlling person in circumstances for which
indemnification is provided under this Subsection f; then, in each such case,
the Company and such Stockholder will contribute to the aggregate losses,
claims, damages or liabilities to which they may be subject (after contribution
from others) in such proportions so that such holder is responsible for the
portion represented by the percentage that the public offering price of its
Registrable shares offered by the Registration Statement bears to the public
offering price of all securities offered by such Registration Statement, and the
Company is responsible for the remaining portion; provided, however, that, in
any such case, (A) no such holder will be required to contribute any amount in
excess of the proceeds to it of all Registrable Shares sold by it pursuant to
such Registration Statement, and (B) no person or entity guilty of fraudulent
misrepresentation, within

                                       8
<PAGE>   9

the meaning of Section 11(f) of the Securities Act, shall be entitled to
contribution from any person or entity who is not guilty of such fraudulent
misrepresentation.

              g.     Indemnification with Respect to Underwritten Offering. In
the event that Registrable Shares are sold pursuant to a Registration Statement
in an underwritten offering pursuant to Subsection b, the Company agrees to
enter into an underwriting agreement containing customary representations and
warranties with respect to the business and operations of an issuer of the
securities being registered and customary covenants and agreements to be
performed by such issuer, including without limitation customary provisions with
respect to indemnification by the Company of the underwriters of such offering.

              h.     Information by Holder. Each Stockholder including
Registrable Shares in any registration shall furnish to the Company such
information regarding such Stockholder and the distribution proposed by such
Stockholder as the Company may reasonably request in writing and as shall be
required in connection with any registration, qualification or compliance
referred to in this Warrant.

              i.     "Stand-Off" Agreement". Each Stockholder, if requested by
the Company and the managing underwriter of an offering by the Company of Common
Stock or other securities of the Company pursuant to a Registration Statement,
shall agree not to sell publicly or otherwise transfer or dispose of any
Registrable Shares or other securities of the Company held by such Stockholder
for a specified period of time (not to exceed 180 days) following the effective
date of such Registration Statement; provided, that:

                     (1)    such agreement shall only apply to the first
Registration Statement covering Common Stock to be sold on its behalf to the
public in an underwritten offering; and

                     (2)    all Stockholders holding not less than the number of
shares of Common Stock held by such Stockholder (including shares of Common
Stock issuable upon the conversion of Shares, or other convertible securities,
or upon the exercise of options, warrants or rights) and all officers and
directors of the Company enter into similar agreements.

              j.     Termination. All of the Company's obligations to register
Registrable Shares under this Warrant shall terminate on the tenth anniversary
of this Warrant.

       3.     Exercise of Warrant.

              a.     The Company covenants that it will at all times maintain an
available and adequate reserve of duly authorized but unissued share of its
Capital Stock, free from preemptive rights, sufficient to effect the full
exercise of this Warrant as herein provided, and that it will at all times
maintain in full force and effect an appropriate permit of the Delaware
Commissioner of Corporations authorizing the issuance and sale by the Company of
all shares of Capital Stock issuable upon exercise of this Warrant by the
holder.

              The Company covenants that all shares of Capital Stock issuable
upon the exercise of this Warrant will, upon issuance, be validly issued, fully
paid and non-assessable, and free from all taxes, liens and charges with respect
to the issue thereof.

              The holder hereof may surrender this Warrant for exchange at the
principal office of the Company. Within a reasonable time thereafter and without
expense (other than transfer taxes, if any) to each holder, the Company shall
issue in exchange therefor, in such denominations (of not less than 100 shares)
and issued in such name or names as the holder shall designate (if permitted by
the Federal Securities laws and the relevant Blue Sky law(s), as amended from
time to time), a new certificate or certificates dated the date hereof
evidencing the right to purchase the same aggregate number of shares of Capital
Stock as are evidenced hereby, and otherwise containing the same provisions and
subject to the same terms and conditions of this certificate.

              Upon surrender of this Warrant at the office of the Company
accompanied by payment of the appropriate Purchase Price of the Capital Stock in
cash or as otherwise allowed herein, the Company shall forthwith cause to be
executed, issued and delivered to the holder of the Warrant a certificate or
certificates for the proper number of shares of capital stock or other
securities of the Company; and the Company covenants that the

                                       9
<PAGE>   10

issuance of this Warrant shall constitute full authority to those of its
officers who are charged with the duty of issuing stock certificates to promptly
execute, issue and deliver to the holder of the Warrant the necessary
certificate for shares of Capital Stock or other securities of the Company
required by such exercise.

              This Warrant may be exercised in accordance with its terms prior
to expiration as a whole, or from time to time in part. In the event of partial
exercise of the Warrant, the Company shall, in addition to delivery of the
securities thereby purchased, deliver to the holder of the Warrant, a new
Warrant for the remaining shares then subject to the unexercised portion of the
Warrant; such new Warrant being dated the date hereof and otherwise containing
the same provisions and subject to the same conditions and subject to the same
terms and conditions as this Warrant. Certificates for shares of Capital Stock
or other securities of the Company issuable by reason of the exercise of
Warrants shall be dated and shall be effective as of the date of the surrender
of the Warrants for exercise or acceptance of the offering of shares or other
securities, as the case may be, and the payment of the appropriate Purchase
Price, notwithstanding any delay in the actual execution, issuance or delivery
of the certificates or securities so purchased.

              This Warrant shall be registered on the books of the Company,
which shall be kept at its principal office for that purpose, and shall be
transferable only on said books by the holder hereof in person or by duly
authorized attorney upon surrender of this Warrant properly endorsed.

              b.     This Warrant may be exercised by the holder hereof, in
whole or in part, by surrendering this Warrant at the principal office of the
Company, or at such other office or agency as the Company may designate,
accompanied by payment in full, in lawful money of the United States, of the
Purchase Price payable in respect of the number of Warrant Shares purchased upon
such exercise.

              c.     The holder hereof may, at its option, elect to pay some or
all of the Purchase Price payable upon an exercise of this Warrant by canceling
a portion of this Warrant exercisable for such number of Warrant Shares as is
determined by dividing (i) the total Purchase Price payable in respect of the
number of Warrant Shares being purchased upon such exercise by (ii) the excess
of the Fair Market Value per share of Common Stock as of the effective date of
exercise (the "Exercise Date") over the Purchase Price per share. The Fair
Market Value per share of Common Stock shall be determined as follows:

                     (1)    If the Common Stock is listed on a national
securities exchange, the NASDAQ National Market System, the NASDAQ system, or
another nationally recognized exchange or trading system as of the Exercise
Date, the Fair Market Value per share of Common Stock shall be deemed to be the
last reported sale price per share of Common Stock thereon on the Exercise Date;
or, if no such price is reported on such date, such price on the next preceding
business day (provided that if no such price is reported on the next preceding
business day, the Fair Market Value per share of Common Stock shall be
determined pursuant to Clause (2)).

                     (2)    If the Common Stock is not listed on a national
securities exchange, the NASDAQ National Market System, the NASDAQ system or
another nationally recognized exchange or trading system as of the Exercise
Date, the Fair Market Value per share of Common Stock shall be deemed to be the
amount most recently determined by the Board of Directors to represent the fair
market value per share of the Common Stock (including without limitation a
determination for purposes of granting Common Stock options or issuing Common
Stock under an employee benefit plan of the Company); and, upon request of the
holder hereof, the Board of Directors (or a representative thereof) shall
promptly notify the holder hereof of the Fair Market Value per share of Common
Stock. Notwithstanding the foregoing, if the Board of Directors has not made
such a determination within the three-month period prior to the Exercise Date,
then (A) the Fair Market Value per share of Common Stock shall be the amount
next determined by the Board of Directors to represent the fair market value per
share of the Common Stock (including without limitation a determination for
purposes of granting Common Stock options or issuing Common Stock under an
employee benefit plan of the Company), (B) the Board of Directors shall make
such a determination within 30 days of a request by the holder hereof that it do
so, and (C) the exercise of this Warrant pursuant to this Subsection 3c shall be
delayed until such determination is made.

              4.     Transfers of Rights. This Warrant, and the rights and
obligations of each holder hereof, may be assigned by such holder hereof to any
person or entity to which not fewer than 100 Shares (issued or issuable under
this Warrant) are transferred by such holder hereof, and such transferee shall
be deemed a "holder

                                       10
<PAGE>   11

hereof" for purposes of this Warrant; provided that the transferee provides
written notice of such assignment to the Company.

              5.     Co-Sale. If Telos Corporation ("Telos") intends at any time
to sell equity securities of the Company (the "Offered Shares") (a) having the
right, or (b) in a transaction providing the prospective purchaser with the
right, to elect a majority of the Board of Directors of the Company, Telos shall
promptly give notice (the "Notice") to the holders hereof of the material terms
of the proposed sale, and the holders hereof shall indicate within twenty (20)
days of such notice the number of shares of Capital Stock which they wish to
sell in such transaction. Telos shall use its best efforts to interest the
prospective purchaser in purchasing, in addition to the Offered Shares, the
shares the holders hereof wish to sell. If the prospective purchaser does not
wish to purchase all of the shares made available by Telos and the holders
hereof, then each holder hereof and Telos shall be entitled to sell, at the
price and on the terms and conditions set forth in the Notice, a portion of the
shares being sold to the prospective purchaser, in the same proportion as Telos'
or the holder's ownership of shares bears to the aggregate number of shares
owned by Telos and the holders hereof.

              6.     General.

                     a.     Notices. All notices, requests, consents, and other
communications under this Warrant shall be in writing and shall be delivered by
hand or mailed by first class certified or registered mail, return receipt
requested, postage prepaid:

                     If to the Company, at 19886 Ashburn Road, Ashburn, VA
20147, Attention: President, or at such other address or addresses as may have
been furnished in writing by the Company to the Holders, with a copy to the
Chief Financial Officer and General Counsel; or

                     If to a holder hereof, at his or its address set forth
above, or at such other address or addresses as may have been furnished to the
Company in writing by such holder hereof.

                     Notices provided in accordance with this Section 6 shall
be deemed delivered upon personal delivery or two business days after deposit in
the mail.

                     b.     Entire Agreement. This Warrant embodies the entire
agreement and understanding between the parties hereto with respect to the
subject matter hereof and supersedes all prior agreements and understandings
relating to such subject matter.

                     c.     Amendments and Waivers. Any term of this Warrant may
be amended and the observance of any term of this Warrant may be waived (either
generally or in a particular instance and either retroactively or
prospectively), with the written consent of the Company and the holders of at
least 90% of the Registrable Shares; provided, that this Warrant may be amended
with

                                       11
<PAGE>   12

the consent of the holders of less than all Registrable Shares only in a manner
which affects all Registrable Shares in the same fashion. No waivers of or
exceptions to any term, condition or provision of this Warrant, in any one or
more instances, shall be deemed to be, or construed as, a further or continuing
waiver of any such term, condition or provision.

                     d.     Fractional Shares. The Company shall not be required
upon the exercise of this Warrant to issue any fractional shares, but shall make
an adjustment therefor in cash on the basis of the Fair Market Value per share
of Common Stock, as determined in good faith by the Board of Directors or as
quoted if the Common Stock is publicly traded on the day the Warrant was
exercised.

Executed in Ashburn, Virginia as of the 12th day of July, 1996.

                                       enterWorks.com, inc.

                                       By:
                                          -----------------------------------
                                           Robert Lewis
                                           President

[SEAL]

Attest:
            Gerald D. Calhoun, Secretary

                                       TELOS CORPORATION
                                       (as to Clause 5 only)

                                       By:
                                          -----------------------------------
                                       William L.P. Brownley
                                       Vice President and General Counsel

[SEAL]

Attest:
            Gerald D. Calhoun, Secretary

                                       12

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