Document:

<PAGE>

                                                                 EXHIBIT 10.16

                              SEVERANCE AGREEMENT
                              -------------------

     This Severance Agreement (the "Agreement") is made and entered into
effective as of January 10, 1998, by and between Ashok Santhanam (the
"Employee") and Inventa Corporation, a California corporation (the "Company").

                                R E C I T A L S

     A.   The Company may from time to time need to address the possibility of
an acquisition transaction or change of control event.  The Board of Directors
of the Company (the "Board") recognizes that such events can be a distraction to
the Employee and can cause the Employee to consider alternative employment
opportunities.  The Board has determined that it is in the best interests of the
Company and its stockholders to assure that the Company will have the continued
dedication and objectivity of the Employee, notwithstanding the possibility,
threat or occurrence of a Change of Control (as defined in Section 6 below) of
the Company.

     B.   The Board believes that it is in the best interests of the Company and
its stockholders to provide the Employee with an incentive to continue his
employment and to motivate the Employee to maximize the value of the Company
upon a Change of Control for the benefit of its stockholders.

     C.   The Board believes that it is imperative to provide the Employee with
certain benefits upon a Change of Control and, under certain circumstances, upon
termination of the Employee's employment in connection with a Change of Control,
which benefits are intended to provide the Employee with financial security and
provide sufficient incentive and encouragement to the Employee to remain with
the Company notwithstanding the possibility of a Change of Control.

     D.   To accomplish the foregoing objectives, the Board has directed the
Company, upon execution of this Agreement by the Employee, to agree to the terms
provided herein.

                               A G R E E M E N T

     In consideration of the mutual covenants herein contained, and in
consideration of the continuing employment of the Employee by the Company, the
parties agree as follows:

     1.   Duties and Scope of Employment.  The Company shall employ the Employee
          ------------------------------
in the position of President and Chief Executive Officer, as such position has
been defined in terms of responsibilities and compensation as of the effective
date of this Agreement; provided, however, that the Board shall have the right,
at any time prior to the occurrence of a Change of Control, to revise such
responsibilities and compensation as the Board in its discretion may deem
necessary or
<PAGE>

appropriate. The Employee shall comply with and be bound by the Company's
operating policies, procedures and practices from time to time in effect during
his employment. During the term of the Employee's employment with the Company,
the Employee shall continue to devote his full time, skill and attention to his
duties and responsibilities, and shall perform them faithfully, diligently and
competently, and the Employee shall use his best efforts to further the business
of the Company and its affiliated entities.

     2.   Compensation.  The Company shall pay the Employee as compensation for
          ------------
his services a base salary at the annualized rate of $120,000.00. Such salary
shall be paid periodically in accordance with normal Company payroll practices.
The annualized compensation specified in this Section 2, as such compensation
may be increased or decreased by the Board or the Compensation Committee of the
Board, is referred to in this Agreement as "Base Compensation."

     3.   Employee Benefits.  The Employee shall be eligible to participate in
          -----------------
the employee benefit plans and executive compensation programs maintained by the
Company applicable to other key executives of the Company, including, without
limitation, retirement plans, savings or profit-sharing plans, stock option,
incentive or other bonus plans, life, disability, health, accident and other
insurance programs, paid vacations, and similar plans or programs, subject in
each case to the generally applicable terms and conditions of the applicable
plan or program in question and to the sole determination of the Board or any
committee administering such plan or program.

     4.   Employment Relationship.  The Company and the Employee acknowledge
          -----------------------
that the Employee's employment is and shall continue to be at-will, as defined
under applicable law.  If the Employee's employment terminates for any reason,
the Employee shall not be entitled to any payments, benefits, damages, awards or
compensation other than as provided by this Agreement, or as may otherwise be
available in accordance with the Company's established employee plans and
policies at the time of termination.

     5.   Termination Without Cause Following a Change of Control.  In the event
          -------------------------------------------------------
of the Employee's termination of employment without cause within 6 months
following a Change of Control, the Company shall

          (a) continue to pay to the Employee as provided herein Employee's Base
Compensation over the period equal to six (6) months from the date of
termination, or, if sooner, until the date Employee obtains other full-time
employment, as severance compensation;

          (b) pay all costs which the Company would otherwise have incurred to
maintain all of Employee's health and welfare, and retirement benefits (either
on the same or substantially equivalent terms and conditions) if the Employee
had continued to render services to the Company for six (6) continuous months
after the date of termination of employment, or, if sooner, until the Employee
obtains other full-time employment; and

                                      -2-
<PAGE>

          (c)  permit options granted to the Employee which have not then vested
to continue to vest in accordance with their stated vesting schedule(s) during
the six (6) month period after the date of termination and to be exercisable
during such six (6) month period to the extent vested, including any options
which would not otherwise have been exercisable during the first year after
grant of such options.

     During the period when such severance compensation is being paid to
Employee, Employee shall not (i) engage, directly or indirectly, in providing
services to any other business, program or project that is competitive to a
program or project being conducted by the Company or any affiliated company at
the time of such employment termination (provided that Executive may own less
than one percent (1%) of the outstanding securities of any publicly-traded
corporation), or (ii) solicit, or attempt to solicit on behalf of himself or any
other party, any employee or exclusive consultant of the Company.

     For purposes of this Agreement, "cause" shall mean the discharge resulting
from a determination by the Board of Directors of the Company that the Employee

              (i)   has been convicted of a misdemeanor or felony involving
dishonesty, fraud, theft or embezzlement or any other felony,

              (ii)  has failed or refused in any material respect, to follow
reasonable written policies or directives established by the Board of Directors,

              (iii) has willfully and persistently failed to attend to material
duties or obligations imposed on him under this Agreement, or

              (iv)  has performed or failed to act, which if he were prosecuted
and convicted would constitute a crime or offense involving money or property of
the Company (in either case in an amount or at a value in excess of $1,000), or
which would constitute a felony in the jurisdiction involved.

          (d) Notwithstanding the foregoing, if, following a Change of Control,
the Employee resigns from employment by the Company or the acquiring company (or
a subsidiary thereof) due to a relocation of the Employee beyond a 30-mile
radius from the Company's headquarters as it existed on the day before the
execution of the definitive agreement with respect to the Change of Control, the
Employee shall receive the severance compensation described in Sections 5(a),
5(b) and 5(c) above. For purposes of this subsection, a change in employment
title or level by itself shall not constitute a material adverse change.

     6.   Definition of Change of Control.  "Change of Control" shall mean the
          -------------------------------
occurrence of any of the following events:

                                      -3-
<PAGE>

          (a) The acquisition by any "person" (as such term is used in Sections
13(d) and 14(d) of the Securities Exchange Act of 1934, as amended (the
"Exchange Act")), other than the Company or a person that directly or indirectly
controls, is controlled by, or is under common control with, the Company, of the
"beneficial ownership" (as defined in Rule 13d-3 under the Exchange Act),
directly or indirectly, of securities of the Company representing more than
fifty percent (50%) of the total voting power represented by the Company's then
outstanding voting securities; or

          (b) A merger or consolidation of the Company with any other
corporation, other than a merger or consolidation which would result in the
voting securities of the Company outstanding immediately prior thereto
continuing to represent (either by remaining outstanding or by being converted
into voting securities of the surviving entity) at least fifty percent (50%) of
the total voting power represented by the voting securities of the Company or
such surviving entity outstanding immediately after such merger or
consolidation, or the approval by the stockholders of the Company of a plan of
complete liquidation of the Company or of an agreement for the sale or
disposition by the Company of all or substantially all of the Company's assets.

     7.   Limitation on Payments.
          ----------------------

          (a) In the event that the severance and other benefits provided for in
this Agreement or otherwise payable to the Employee (i) constitute "parachute
payments" within the meaning of Section 280G of the Internal Revenue Code of
1986, as amended (the "Code") and (ii) but for this Section 7 would be subject
to the excise tax imposed by Section 4999 of the Code, then the severance
compensation under Section 5 shall occur either (i) in full, or (ii) as to such
lesser amount which would result in no portion of such severance compensation
being subject to excise tax under Section 4999 of the Code, whichever of the
foregoing amounts, taking into account the applicable federal, state and local
income taxes and the excise tax imposed by Section 4999, results in the receipt
by the Employee on an after-tax basis, of the greatest benefits under this
Agreement, notwithstanding that all or some portion of such severance benefits
may be taxable under Section 4999 of the Code.

          (b) Unless the Company and the Employee otherwise agree in writing,
any determination required under this Section 7 shall be made in writing by the
Company's independent public accountants (the "Accountants"), whose
determination shall be conclusive and binding upon the Employee and the Company
for all purposes.  For purposes of making the calculations required by this
Section 7, the Accountants may make reasonable assumptions and approximations
concerning applicable taxes and may rely on reasonable, good faith
interpretations concerning the application of Sections 280G and 4999 of the
Code.  The Company and the Employee shall furnish to the Accountants such
information and documents as the Accountants may reasonably request in order to
make a determination under this Section.  The Company shall bear all costs the
Accountants may reasonably incur in connection with any calculations
contemplated by this Section 7.

                                      -4-
<PAGE>

     8.   Certain Business Combinations.  In the event it is determined by the
          -----------------------------
Board, upon receipt of a written opinion of the Company's independent public
accountants, that the enforcement of any Section or subsection of this
Agreement, upon a Change of Control, would preclude accounting for any proposed
business combination of the Company involving a Change of Control as a pooling
of interests, and the Board otherwise desires to approve such a proposed
business transaction which requires as a condition to the closing of such
transaction that it be accounted for as a pooling of interests, then any such
Section of this Agreement shall be null and void, but only if the absence of
enforcement of such Section would preserve the pooling treatment.  For purposes
of this Section 8, the Board's determination shall only require the approval of
a majority of the disinterested Board members.

     9.   Successors.
          ----------

          (a) Company's Successors.  Any successor to the Company (whether
              --------------------
direct or indirect and whether by purchase, lease, merger, consolidation,
liquidation or otherwise) to all or substantially all of the Company's business
and assets shall assume the obligations under this Agreement and agree expressly
to perform the obligations under this Agreement in the same manner and to the
same extent as the Company would be required to perform such obligations in the
absence of a succession.  For all purposes under this Agreement, the term
"Company" shall include any successor to the Company's business and assets which
executes and delivers the assumption agreement described in this Section 9(a) or
which becomes bound by the terms of this Agreement by operation of law.

          (b) Employee's Successors.  The terms of this Agreement and all rights
              ---------------------
of the Employee hereunder shall inure to the benefit of, and be enforceable by,
the Employee's personal or legal representatives, executors, administrators,
successors, heirs, devisees and legatees.

     10.  Notice.  Notices and all other communications contemplated by this
          ------
Agreement shall be in writing and shall be deemed to have been duly given when
personally delivered or when mailed by U.S. registered or certified mail, return
receipt requested and postage prepaid.  In the case of the Employee, mailed
notices shall be addressed to him at the home address which he most recently
communicated to the Company in writing.  In the case of the Company, mailed
notices shall be addressed to its corporate headquarters, and all notices shall
be directed to the attention of its Secretary.

     11.  Miscellaneous Provisions.
          ------------------------

          (a) Waiver.  No provision of this Agreement shall be modified, waived
              ------
or discharged unless the modification, waiver or discharge is agreed to in
writing and signed by the Employee and by an authorized officer of the Company
(other than the Employee).  No waiver by either party of any breach of, or of
compliance with, any condition or provision of this Agreement by the other party
shall be considered a waiver of any other condition or provision or of the same
condition or provision at another time.

                                      -5-
<PAGE>

          (b) Whole Agreement.  No agreements, representations or understandings
              ---------------
(whether oral or written and whether express or implied) which are not expressly
set forth in this Agreement have been made or entered into by either party with
respect to the subject matter hereof.

          (c) Choice of Law.  The validity, interpretation, construction and
              -------------
performance of this Agreement shall be governed by the laws of the State of
California.

          (d) Severability.  The invalidity or unenforceability of any provision
              ------------
or provisions of this Agreement shall not affect the validity or enforceability
of any other provision hereof, which shall remain in full force and effect.

          (e) Arbitration.  Any dispute or controversy arising out of, relating
              -----------
to or in connection with this Agreement shall be settled exclusively by binding
arbitration in San Francisco, California, in accordance with the National Rules
for the Resolution of Employment Disputes of the American Arbitration
Association then in effect.  Judgment may be entered on the arbitrator's award
in any court having jurisdiction.  The Company and the Employee shall each pay
one-half of the costs and expenses of such arbitration, and each shall
separately pay its counsel fees and expenses.  Punitive damages shall not be
awarded.

          (f) No Assignment of Benefits.  The rights of any person to payments
              -------------------------
or benefits under this Agreement shall not be made subject to option or
assignment, either by voluntary or involuntary assignment or by operation of
law, including (without limitation) bankruptcy, garnishment, attachment or other
creditor's process, and any action in violation of this Section 11(f) shall be
void.

          (g) Assignment by Company.  The Company may assign its rights under
              ---------------------
this Agreement to an affiliate, and an affiliate may assign its rights under
this Agreement to another affiliate of the Company or to the Company; provided,
however, that no assignment shall be made if the net worth of the assignee is
less than the net worth of the Company at the time of assignment.  In the case
of any such assignment, the term "Company" when used in a section of this
Agreement shall mean the corporation that actually employs the Employee.

          (h) Counterparts.  This Agreement may be executed in counterparts,
              ------------
each of which shall be deemed an original, but all of which together will
constitute one and the same instrument.

                                      -6-
<PAGE>

          IN WITNESS WHEREOF, each of the parties has executed this Agreement,
in the case of the Company by its duly authorized officer, as of the day and
year first above written.

COMPANY:                                INVENTA CORPORATION

                                        By: /s/ A. Santhanam
                                            -------------------------------

                                        Title: President
                                              -----------------------------

EMPLOYEE:                                 /s/  A. Santhanam
                                        -----------------------------------
                                        Ashok Santhanam<PAGE>

                                                                Exhibit 10.17

                              SEVERANCE AGREEMENT
                              -------------------

     This Severance Agreement (the "Agreement") is made and entered into
effective as of January 13, 1998, by and between Ed Leppert (the "Employee")
and Inventa Corporation, a California corporation (the "Company").

                                R E C I T A L S

     A.   The Company may from time to time need to address the possibility of
an acquisition transaction or change of control event.  The Board of Directors
of the Company (the "Board") recognizes that such events can be a distraction to
the Employee and can cause the Employee to consider alternative employment
opportunities.  The Board has determined that it is in the best interests of the
Company and its stockholders to assure that the Company will have the continued
dedication and objectivity of the Employee, notwithstanding the possibility,
threat or occurrence of a Change of Control (as defined in Section 6 below) of
the Company.

     B.   The Board believes that it is in the best interests of the Company and
its stockholders to provide the Employee with an incentive to continue his
employment and to motivate the Employee to maximize the value of the Company
upon a Change of Control for the benefit of its stockholders.

     C.   The Board believes that it is imperative to provide the Employee with
certain benefits upon a Change of Control and, under certain circumstances, upon
termination of the Employee's employment in connection with a Change of Control,
which benefits are intended to provide the Employee with financial security and
provide sufficient incentive and encouragement to the Employee to remain with
the Company notwithstanding the possibility of a Change of Control.

     D.   To accomplish the foregoing objectives, the Board has directed the
Company, upon execution of this Agreement by the Employee, to agree to the terms
provided herein.

                               A G R E E M E N T

     In consideration of the mutual covenants herein contained, and in
consideration of the continuing employment of the Employee by the Company, the
parties agree as follows:

1.        Duties and Scope of Employment.  The Company shall employ the Employee
          ------------------------------
     in the position of Managing Director, Eastern U.S. Operations, as such
     position has been defined in terms of responsibilities and compensation as
     of the effective date of this Agreement;

                                       1
<PAGE>

     provided, however, that the Board shall have the right, at any time prior
     to the occurrence of a Change of Control, to revise such responsibilities
     and compensation as the Board in its discretion may deem necessary or
     appropriate. The Employee shall comply with and be bound by the Company's
     operating policies, procedures and practices from time to time in effect
     during his employment. During the term of the Employee's employment with
     the Company, the Employee shall continue to devote his full time, skill and
     attention to his duties and responsibilities, and shall perform them
     faithfully, diligently and competently, and the Employee shall use his best
     efforts to further the business of the Company and its affiliated entities.

2.        Compensation.  The Company shall pay the Employee as compensation for
          ------------
     his services a base salary at the annualized rate of $160,000.00.  Such
     salary shall be paid periodically in accordance with normal Company payroll
     practices. The annualized compensation specified in this Section 2, as such
     compensation may be increased or decreased by the Board or the Compensation
     Committee of the Board, is referred to in this Agreement as "Base
     Compensation."

3.        Employee Benefits.  The Employee shall be eligible to participate in
          -----------------
     the employee benefit plans and executive compensation programs maintained
     by the Company applicable to other key executives of the Company,
     including, without limitation, retirement plans, savings or profit-sharing
     plans, stock option, incentive or other bonus plans, life, disability,
     health, accident and other insurance programs, paid vacations, and similar
     plans or programs, subject in each case to the generally applicable terms
     and conditions of the applicable plan or program in question and to the
     sole determination of the Board or any committee administering such plan or
     program.

4.        Employment Relationship.  The Company and the Employee acknowledge
          -----------------------
     that the Employee's employment is and shall continue to be at-will, as
     defined under applicable law. If the Employee's employment terminates for
     any reason, the Employee shall not be entitled to any payments, benefits,
     damages, awards or compensation other than as provided by this Agreement,
     or as may otherwise be available in accordance with the Company's
     established employee plans and policies at the time of termination.

5.        Termination Without Cause Following a Change of Control.  In the event
          -------------------------------------------------------
     of the Employee's termination of employment without cause within 6 months
     following a Change of Control, the Company shall

          (a) continue to pay to the Employee as provided herein Employee's Base
Compensation over the period equal to six (6) months from the date of
termination, or, if sooner, until the date Employee obtains other full-time
employment, as severance compensation;

          (b) pay all costs which the Company would otherwise have incurred to
maintain all of Employee's health and welfare, and retirement benefits (either
on the same or substantially

                                       2
<PAGE>

equivalent terms and conditions) if the Employee had continued to render
services to the Company for six (6) continuous months after the date of
termination of employment, or, if sooner, until the Employee obtains other full-
time employment; and

          (c)  permit options granted to the Employee which have not then vested
to continue to vest in accordance with their stated vesting schedule(s) during
the six (6) month period after the date of termination and to be exercisable
during such six (6) month period to the extent vested, including any options
which would not otherwise have been exercisable during the first year after
grant of such options.

     During the period when such severance compensation is being paid to
Employee, Employee shall not (i) engage, directly or indirectly, in providing
services to any other business, program or project that is competitive to a
program or project being conducted by the Company or any affiliated company at
the time of such employment termination (provided that Executive may own less
than one percent (1%) of the outstanding securities of any publicly-traded
corporation), or (ii) solicit, or attempt to solicit on behalf of himself or any
other party, any employee or exclusive consultant of the Company.

     For purposes of this Agreement, "cause" shall mean the discharge resulting
from a determination by the Board of Directors of the Company that the Employee

          i.          has been convicted of a misdemeanor or felony involving
               dishonesty, fraud, theft or embezzlement or any other felony,

               (ii)   has failed or refused in any material respect, to follow
reasonable written policies or directives established by the Board of Directors,

               (iii)  has willfully and persistently failed to attend to
material duties or obligations imposed on him under this Agreement, or

               (iv)   has performed or failed to act, which if he were
prosecuted and convicted would constitute a crime or offense involving money or
property of the Company (in either case in an amount or at a value in excess of
$1,000), or which would constitute a felony in the jurisdiction involved.

          (d)  Notwithstanding the foregoing, if, following a Change of Control,
the Employee resigns from employment by the Company or the acquiring company (or
a subsidiary thereof) due to a relocation of the Employee beyond a 30-mile
radius from the Company's headquarters as it existed on the day before the
execution of the definitive agreement with respect to the Change of Control, the
Employee shall receive the severance compensation described in Sections 5(a),
5(b) and 5(c) above.  For purposes of this subsection, a change in employment
title or level by itself shall not constitute a material adverse change.

                                       3
<PAGE>

     6.   Definition of Change of Control.  "Change of Control" shall mean the
          -------------------------------
occurrence of any of the following events:

          (a) The acquisition by any "person" (as such term is used in Sections
13(d) and 14(d) of the Securities Exchange Act of 1934, as amended (the
"Exchange Act")), other than the Company or a person that directly or indirectly
controls, is controlled by, or is under common control with, the Company, of the
"beneficial ownership" (as defined in Rule 13d-3 under the Exchange Act),
directly or indirectly, of securities of the Company representing more than
fifty percent (50%) of the total voting power represented by the Company's then
outstanding voting securities; or

          (b) A merger or consolidation of the Company with any other
corporation, other than a merger or consolidation which would result in the
voting securities of the Company outstanding immediately prior thereto
continuing to represent (either by remaining outstanding or by being converted
into voting securities of the surviving entity) at least fifty percent (50%) of
the total voting power represented by the voting securities of the Company or
such surviving entity outstanding immediately after such merger or
consolidation, or the approval by the stockholders of the Company of a plan of
complete liquidation of the Company or of an agreement for the sale or
disposition by the Company of all or substantially all of the Company's assets.

     7.   Limitation on Payments.
          ----------------------

          (a) In the event that the severance and other benefits provided for in
this Agreement or otherwise payable to the Employee (i) constitute "parachute
payments" within the meaning of Section 280G of the Internal Revenue Code of
1986, as amended (the "Code") and (ii) but for this Section 7 would be subject
to the excise tax imposed by Section 4999 of the Code, then the severance
compensation under Section 5 shall occur either (i) in full, or (ii) as to such
lesser amount which would result in no portion of such severance compensation
being subject to excise tax under Section 4999 of the Code, whichever of the
foregoing amounts, taking into account the applicable federal, state and local
income taxes and the excise tax imposed by Section 4999, results in the receipt
by the Employee on an after-tax basis, of the greatest benefits under this
Agreement, notwithstanding that all or some portion of such severance benefits
may be taxable under Section 4999 of the Code.

          (b) Unless the Company and the Employee otherwise agree in writing,
any determination required under this Section 7 shall be made in writing by the
Company's independent public accountants (the "Accountants"), whose
determination shall be conclusive and binding upon the Employee and the Company
for all purposes.  For purposes of making the calculations required by this
Section 7, the Accountants may make reasonable assumptions and approximations
concerning applicable taxes and may rely on reasonable, good faith
interpretations concerning the application of Sections 280G and 4999 of the
Code.  The Company and the Employee shall furnish to the Accountants such
information and documents as the Accountants may reasonably request in

                                       4
<PAGE>

order to make a determination under this Section. The Company shall bear all
costs the Accountants may reasonably incur in connection with any calculations
contemplated by this Section 7.

     8.   Certain Business Combinations.  In the event it is determined by the
          -----------------------------
Board, upon receipt of a written opinion of the Company's independent public
accountants, that the enforcement of any Section or subsection of this
Agreement, upon a Change of Control, would preclude accounting for any proposed
business combination of the Company involving a Change of Control as a pooling
of interests, and the Board otherwise desires to approve such a proposed
business transaction which requires as a condition to the closing of such
transaction that it be accounted for as a pooling of interests, then any such
Section of this Agreement shall be null and void, but only if the absence of
enforcement of such Section would preserve the pooling treatment.  For purposes
of this Section 8, the Board's determination shall only require the approval of
a majority of the disinterested Board members.

     9.   Successors.
          ----------

          (a) Company's Successors.  Any successor to the Company (whether
              --------------------
direct or indirect and whether by purchase, lease, merger, consolidation,
liquidation or otherwise) to all or substantially all of the Company's business
and assets shall assume the obligations under this Agreement and agree expressly
to perform the obligations under this Agreement in the same manner and to the
same extent as the Company would be required to perform such obligations in the
absence of a succession.  For all purposes under this Agreement, the term
"Company" shall include any successor to the Company's business and assets which
executes and delivers the assumption agreement described in this Section 9(a) or
which becomes bound by the terms of this Agreement by operation of law.

          (b) Employee's Successors.  The terms of this Agreement and all rights
              ---------------------
of the Employee hereunder shall inure to the benefit of, and be enforceable by,
the Employee's personal or legal representatives, executors, administrators,
successors, heirs, devisees and legatees.

     10.  Notice.  Notices and all other communications contemplated by this
          ------
Agreement shall be in writing and shall be deemed to have been duly given when
personally delivered or when mailed by U.S. registered or certified mail, return
receipt requested and postage prepaid.  In the case of the Employee, mailed
notices shall be addressed to him at the home address which he most recently
communicated to the Company in writing.  In the case of the Company, mailed
notices shall be addressed to its corporate headquarters, and all notices shall
be directed to the attention of its Secretary.

     11.  Miscellaneous Provisions.
          ------------------------

          (a) Waiver.  No provision of this Agreement shall be modified, waived
              ------
or discharged unless the modification, waiver or discharge is agreed to in
writing and signed by the Employee and by an authorized officer of the Company
(other than the Employee).  No waiver by

                                       5
<PAGE>

either party of any breach of, or of compliance with, any condition or provision
of this Agreement by the other party shall be considered a waiver of any other
condition or provision or of the same condition or provision at another time.

          (b) Whole Agreement.  No agreements, representations or understandings
              ---------------
(whether oral or written and whether express or implied) which are not expressly
set forth in this Agreement have been made or entered into by either party with
respect to the subject matter hereof.

          (c) Choice of Law.  The validity, interpretation, construction and
              -------------
performance of this Agreement shall be governed by the laws of the State of
California.

          (d) Severability.  The invalidity or unenforceability of any provision
              ------------
or provisions of this Agreement shall not affect the validity or enforceability
of any other provision hereof, which shall remain in full force and effect.

          (e) Arbitration.  Any dispute or controversy arising out of, relating
              -----------
to or in connection with this Agreement shall be settled exclusively by binding
arbitration in San Francisco, California, in accordance with the National Rules
for the Resolution of Employment Disputes of the American Arbitration
Association then in effect.  Judgment may be entered on the arbitrator's award
in any court having jurisdiction.  The Company and the Employee shall each pay
one-half of the costs and expenses of such arbitration, and each shall
separately pay its counsel fees and expenses.  Punitive damages shall not be
awarded.

          (f) No Assignment of Benefits.  The rights of any person to payments
              -------------------------
or benefits under this Agreement shall not be made subject to option or
assignment, either by voluntary or involuntary assignment or by operation of
law, including (without limitation) bankruptcy, garnishment, attachment or other
creditor's process, and any action in violation of this Section 11(f) shall be
void.

          (g) Assignment by Company.  The Company may assign its rights under
              ---------------------
this Agreement to an affiliate, and an affiliate may assign its rights under
this Agreement to another affiliate of the Company or to the Company; provided,
however, that no assignment shall be made if the net worth of the assignee is
less than the net worth of the Company at the time of assignment.  In the case
of any such assignment, the term "Company" when used in a section of this
Agreement shall mean the corporation that actually employs the Employee.

          (h) Counterparts.  This Agreement may be executed in counterparts,
              ------------
each of which shall be deemed an original, but all of which together will
constitute one and the same instrument.

                                       6
<PAGE>

          IN WITNESS WHEREOF, each of the parties has executed this Agreement,
in the case of the Company by its duly authorized officer, as of the day and
year first above written.

COMPANY:                      INVENTA CORPORATION

                              By: /s/ A. Santhanam
                                 ------------------------------

                              Title:  President
                                    ----------------------------

EMPLOYEE:                     /s/ Ed Leppert
                              ----------------------------------
                              Ed Leppert

                                       7

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