<PAGE>
                                                                     EXHIBIT 4.3



                         REGISTRATION RIGHTS AGREEMENT

        THIS REGISTRATION RIGHTS AGREEMENT (the "Agreement") is made and entered
into as of April 5, 2002, by and between Documentum, Inc., a Delaware
corporation (the "Company"), and UBS Warburg LLC (the "Initial Purchaser")
pursuant to that certain Purchase Agreement, dated as of April 1, 2002 (the
"Purchase Agreement") between the Company and the Initial Purchaser.

        In order to induce the Initial Purchaser to enter into the Purchase
Agreement, the Company has agreed to provide the registration rights set forth
in this Agreement. The execution of this Agreement is a condition to the closing
under the Purchase Agreement.

        The Company agrees with the Initial Purchaser (i) for its benefit as
Initial Purchaser and (ii) for the benefit of the beneficial owners (including
the Initial Purchaser) from time to time of the Notes (as defined herein) and
the beneficial owners from time to time of the Underlying Common Stock (as
defined herein) issued upon conversion of the Notes (each of the foregoing a
"Holder" and together the "Holders"), as follows:

        Section 1. Definitions. Capitalized terms used herein without definition
shall have their respective meanings set forth in the Purchase Agreement. As
used in this Agreement, the following terms shall have the following meanings:

        "Affiliate" means with respect to any specified person, an "affiliate,"
as defined in Rule 144, of such person.

        "Amendment Effectiveness Deadline Date" has the meaning set forth in
Section 2(d) hereof.

        "Applicable Conversion Price" means, as of any date of determination,
the Conversion Price then in effect as of the date of determination or, if no
Notes are then outstanding, the Conversion Price that would be in effect were
Notes then outstanding.

        "Business Day" means each day on which the National Association of
Securities Dealers Automated Quotations National Market is open for trading.

        "Common Stock" means the shares of common stock, par value $0.001 per
share, of the Company and any other shares of capital stock as may constitute
"Common Stock" for purposes of the Indenture, including the Underlying Common
Stock.

        "Conversion Price" has the meaning assigned to such term in the
Indenture.



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<PAGE>

        "Damages Accrual Period" has the meaning set forth in Section 2(e)
hereof.

        "Damages Payment Date" means April 1 and October 1 on which any
Liquidated Damages Amount is payable pursuant to Section 2(e) hereof to the
holder of record of the Notes or of the Underlying Common Stock, as the case may
be, on the immediately preceding March 15 or September 15, respectively.

        "Effectiveness Deadline Date" has the meaning set forth in Section 2(a)
hereof.

        "Effectiveness Period" means a period of two years after the later of
the date (1) of the original issuance of the Notes and (2) when all of the
Registrable Securities covered by the Shelf Registration Statement have ceased
to be Registrable Securities.

        "Event" has the meaning set forth in Section 2(e) hereof.

        "Event Date" has the meaning set forth in Section 2(e) hereof.

        "Exchange Act" means the Securities Exchange Act of 1934, as amended,
and the rules and regulations of the SEC promulgated thereunder.

        "Filing Deadline Date" has the meaning set forth in Section 2(a) hereof.

        "Holder" has the meaning set forth in the third paragraph of this
Agreement.

        "Indenture" means the Indenture, dated as of April 5, 2002, between the
Company and Wilmington Trust Company, as trustee, pursuant to which the Notes
are being issued.

        "Initial Purchaser" has the meaning set forth in the preamble hereto.

        "Initial Shelf Registration Statement" has the meaning set forth in
Section 2(a) hereof.

        "Issue Date" means the first date of original issuance of the Notes.

        "Liquidated Damages Amount" has the meaning set forth in Section 2(e)
hereof.

        "Material Event" has the meaning set forth in Section 3(i) hereof.

        "Notes" means the 4 1/2% Senior Convertible Notes due 2007 of the
Company to be purchased pursuant to the Purchase Agreement.



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<PAGE>

        "Notice and Questionnaire" means a written notice and questionnaire
delivered to the Company containing substantially the information called for by
the Selling Securityholder Notice and Questionnaire attached as Annex A to the
Offering Memorandum dated April 1, 2002 relating to the Notes.

        "Notice Holder" means, on any date, any Holder that has delivered a
properly completed and signed Notice and Questionnaire to the Company on or
prior to such date, so long as all of their Registrable Securities that have
been registered for resale pursuant to a Notice and Questionnaire have not been
sold in accordance with a Shelf Registration Statement.

        "Purchase Agreement" has the meaning set forth in the preamble hereof.

        "Prospectus" means the prospectus included in any Shelf Registration
Statement (including, without limitation, a prospectus that discloses
information previously omitted from a prospectus filed as part of an effective
registration statement in reliance upon Rule 415 promulgated under the
Securities Act), as amended or supplemented by any amendment or prospectus
supplement, including post-effective amendments, and all materials incorporated
by reference or explicitly deemed to be incorporated by reference in such
Prospectus.

        "Record Holder" means (i) with respect to any Damages Payment Date
relating to any Notes as to which any such Liquidated Damages Amount has
accrued, the holder of record of such Note on the record date with respect to
the interest payment date under the Indenture on which such Damages Payment Date
shall occur and (ii) with respect to any Damages Payment Date relating to the
Underlying Common Stock as to which any such Liquidated Damages Amount has
accrued, the registered holder of such Underlying Common Stock fifteen (15) days
prior to such Damages Payment Date.

        "Registrable Securities" means at all times the Notes and the Underlying
Common Stock and any securities into or for which such Underlying Common Stock
has been converted, and any security issued with respect thereto upon any stock
dividend, split or similar event until the earlier of (x) the date on which such
Notes or Underlying Common Stock have been effectively registered under the
Securities Act and disposed of, whether or not in accordance with the Shelf
Registration Statement and (y) the date that is two years after the date of the
original issuance of the Notes.

        "Registration Expenses" has the meaning set forth in Section 5 hereof.

        "Registration Statement" means any registration statement of the Company
that covers any of the Registrable Securities pursuant to the provisions of this
Agreement including the Prospectus, amendments and supplements to such
registration statement, including post-effective amendments, all exhibits, and
all materials incorporated by reference or explicitly deemed to be incorporated
by reference in such registration statement.



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<PAGE>

        "Rule 144" means Rule 144 under the Securities Act, as such Rule may be
amended from time to time, or any similar rule or regulation hereafter adopted
by the SEC.

        "Rule 144A" means Rule 144A under the Securities Act, as such Rule may
be amended from time to time, or any similar rule or regulation hereafter
adopted by the SEC.

        "SEC" means the Securities and Exchange Commission.

        "Securities Act" means the Securities Act of 1933, as amended, and the
rules and regulations promulgated by the SEC thereunder.

        "Shelf Registration Statement" has the meaning set forth in Section 2(a)
hereof.

        "Subsequent Shelf Registration Statement" has the meaning set forth in
Section 2(b) hereof.

        "Suspension Notice" has the meaning set forth in Section 3(i) hereof.

        "Suspension Period" has the meaning set forth in Section 3(i) hereof.

        "TIA" means the Trust Indenture Act of 1939, as amended.

        "Trustee" means Wilmington Trust Company, the Trustee under the
Indenture.

        "Underlying Common Stock" means the Common Stock into which the Notes
are convertible or issued upon any such conversion.

        Section 2. Shelf Registration. (a) The Company shall prepare and file or
cause to be prepared and filed with the SEC, as soon as practicable but in any
event by the date that is ninety (90) days after the Issue Date(the "Filing
Deadline Date"), a Registration Statement for an offering to be made on a
delayed or continuous basis pursuant to Rule 415 of the Securities Act (a "Shelf
Registration Statement") registering the resale from time to time by Holders
thereof of all of the Registrable Securities (the "Initial Shelf Registration
Statement"). The Initial Shelf Registration Statement shall be on Form S-1 or
S-3 or another appropriate form permitting registration of such Registrable
Securities for resale by such Holders in accordance with the reasonable methods
of distribution elected by the Holders, approved by the Company, and set forth
in the Initial Shelf Registration Statement. The Company shall use commercially
reasonable efforts to cause the Initial Shelf Registration Statement to be
declared effective under the Securities Act as promptly as is practicable but in
any event by the date (the "Effectiveness Deadline Date") that is one hundred
eighty (180) days after the Issue Date, and to keep the Initial Shelf
Registration Statement (or any Subsequent Shelf Registration Statement)
continuously effective under the Securities Act until the



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<PAGE>

expiration of the Effectiveness Period. At the time the Initial Shelf
Registration Statement is declared effective, each Holder that became a Notice
Holder on or prior to the date that is ten (10) Business Days prior to such time
of effectiveness shall be named as a selling securityholder in the Initial Shelf
Registration Statement and the related Prospectus in such a manner as to permit
such Holder to deliver such Prospectus to purchasers of Registrable Securities
in accordance with applicable law.

          (b) If the Initial Shelf Registration Statement or any Subsequent
Shelf Registration Statement ceases to be effective for any reason at any time
during the Effectiveness Period, the Company shall use commercially reasonable
efforts to obtain the prompt withdrawal of any order suspending the
effectiveness thereof, and in any event shall within thirty (30) days of such
cessation of effectiveness amend the Shelf Registration Statement in a manner
reasonably expected to obtain the withdrawal of the order suspending the
effectiveness thereof, or file an additional Shelf Registration Statement
covering all of the securities that as of the date of such filing are
Registrable Securities (a "Subsequent Shelf Registration Statement"). If a
Subsequent Shelf Registration Statement is filed, the Company shall use
commercially reasonable efforts to cause the Subsequent Shelf Registration
Statement to become effective as promptly as is practicable after such filing
and to keep such Shelf Registration Statement (or subsequent Shelf Registration
Statement) continuously effective until the end of the Effectiveness Period.

          (c) The Company shall supplement and amend the Shelf Registration
Statement if required by the rules, regulations or instructions applicable to
the registration form used by the Company for such Shelf Registration Statement,
if required by the Securities Act or as reasonably requested by the Initial
Purchaser or by the Trustee on behalf of the Holders of the Registrable
Securities covered by such Shelf Registration Statement.

          (d) Each Holder of Registrable Securities agrees that if such Holder
wishes to sell Registrable Securities pursuant to a Shelf Registration Statement
and related Prospectus, it will do so only in accordance with this Section 2(d)
and Section 3(i). Each Holder of Registrable Securities wishing to be named as a
selling stockholder in the Shelf Registration Statement and related Prospectus
agrees to deliver a completed and executed Notice and Questionnaire to the
Company within twenty (20) Business Days from the date on which the Notice and
Questionnaire is first sent to such Holders by the Company. From and after the
date the Initial Shelf Registration Statement is declared effective, the Company
shall, as promptly as practicable after the date a Notice and Questionnaire is
delivered, and in any event within the later of (x) ten (10) Business Days after
such date or (y) ten (10) Business Days after the expiration of any Suspension
Period (1) in effect when the Notice and Questionnaire is delivered or (2) put
into effect within ten (10) Business Days of such delivery date, (i) if required
by applicable law, file with the SEC a post-effective amendment to the Shelf
Registration Statement or, if required by applicable law,



                                       5
<PAGE>

prepare and file a supplement to the related Prospectus or a supplement or
amendment to any document incorporated therein by reference or file any other
required document so that the Holder delivering such Notice and Questionnaire is
named as a selling securityholder in the Shelf Registration Statement and the
related Prospectus in such a manner as to permit such Holder to deliver such
Prospectus to purchasers of the Registrable Securities in accordance with
applicable law and, if the Company shall file a post-effective amendment to the
Shelf Registration Statement, use commercially reasonable efforts to cause such
post-effective amendment to be declared effective under the Securities Act as
promptly as is practicable, but in any event by the date (the "Amendment
Effectiveness Deadline Date") that is thirty (30) days after the date such
post-effective amendment is required by this clause to be filed; (ii) provide
such Holder a reasonable number of copies of any documents filed pursuant to
Section 2(d)(i); and (iii) notify such Holder as promptly as practicable after
the effectiveness under the Securities Act of any post-effective amendment filed
pursuant to Section 2(d)(i); provided that if such Notice and Questionnaire is
delivered during a Suspension Period, or a Suspension Period is put into effect
within ten (10) Business Days after such delivery date, the Company shall so
inform the Holder delivering such Notice and Questionnaire and shall take the
actions set forth in clauses (i), (ii) and (iii) above within ten (10) Business
Days after expiration of the Suspension Period in accordance with Section 3(i);
provided further that if under applicable law, the Company has more than one
option as to the type or manner of making any such filing, the Company shall
make the required filing or filings in the manner or of a type that is
reasonably expected to result in the earliest availability of the Prospectus for
effecting resales of Registrable Securities. Notwithstanding anything contained
herein to the contrary, the Company shall be under no obligation to name any
Holder that is not a Notice Holder as a selling securityholder in any Shelf
Registration Statement or related Prospectus; provided, however, that any Holder
that becomes a Notice Holder pursuant to the provisions of this Section 2(d)
(whether or not such Holder was a Notice Holder at the time the Shelf
Registration Statement was declared effective) shall be named as a selling
securityholder in the Shelf Registration Statement or related Prospectus in
accordance with the requirements of this Section 2(d).

          (e) The parties hereto agree that the Holders of Registrable
Securities will suffer damages, and that it would not be feasible to ascertain
the extent of such damages with precision, if (i) the Initial Shelf Registration
Statement has not been filed on or prior to the Filing Deadline Date, (ii) the
Initial Shelf Registration Statement has not been declared effective under the
Securities Act on or prior to the Effectiveness Deadline Date or (iii) the
Initial Shelf Registration Statement is filed and declared effective but shall
thereafter cease to be effective (without being succeeded by an additional
registration statement filed and declared effective in accordance with Section
2(b)) or usable for the offer and sale of Registrable Securities for a period of
time (including any Suspension Period) which shall exceed thirty (30) days in
the aggregate in any three (3) month period



                                       6
<PAGE>

or one hundred twenty (120) days in the aggregate in any twelve (12) month
period (each of the events of a type described in any of the foregoing clauses
(i) through (iii) are individually referred to herein as an "Event," and the
Filing Deadline Date in the case of clause (i), the Effectiveness Deadline Date
in the case of clause (ii), the date on which the duration of the
ineffectiveness or unusability of the Initial Shelf Registration Statement in
any period exceeds the number of days permitted by clause (iii) hereof in the
case of clause (iii), being referred to herein as an "Event Date"). Events shall
be deemed to continue until the following dates with respect to the respective
types of Events: the date the Initial Shelf Registration Statement is filed in
the case of an Event of the type described in clause (i), the date the Initial
Shelf Registration Statement is declared effective under the Securities Act in
the case of an Event of the type described in clause (ii), and the date the
Initial Shelf Registration Statement becomes effective or usable again in the
case of an Event of the type described in clause (iii).

        Accordingly, commencing on (and including) any Event Date and ending on
(but excluding) the next date on which there are no Events that have occurred
and are continuing (a "Damages Accrual Period"), the Company agrees to pay, as
liquidated damages and not as a penalty, an amount (the "Liquidated Damages
Amount") at the rate described below, payable periodically on each Damages
Payment Date to Record Holders of Notes that are Registrable Securities and of
shares of Underlying Common Stock issued upon conversion of Notes that are
Registrable Securities, as the case may be, to the extent of, for each such
Damages Payment Date, accrued and unpaid Liquidated Damages Amount to (but
excluding) such Damages Payment Date (or, if the Damages Accrual Period shall
have ended prior to such Damages Payment Date, the date of the end of the
Damages Accrual Period); provided that any Liquidated Damages Amount accrued
with respect to any Note or portion thereof called for redemption on a
redemption date or converted into Underlying Common Stock on a conversion date
prior to the Damages Payment Date, shall, in any such event, be paid instead to
the Holder who submitted such Note or portion thereof for redemption or
conversion on the applicable redemption date or conversion date, as the case may
be, on such date (or promptly following the conversion date, in the case of
conversion). The Liquidated Damages Amount shall accrue at a rate per annum
equal to one-quarter of one percent (0.25%) for the first 90-day period from the
Event Date, at a rate per annum equal to one-half of one percent (0.5%) for the
next succeeding 90-day period and thereafter at a rate per annum equal to three
quarters of one percent (0.75%) of (i) the principal amount of such Notes or,
without duplication, (ii) in the case of Notes that have been converted into
Underlying Common Stock, the Applicable Conversion Price of such shares of
Underlying Common Stock, as the case may be, in each case determined as of the
Business Day immediately preceding the next Damages Payment Date.
Notwithstanding the foregoing, no Liquidated Damages Amounts shall accrue as to
any Registrable Security from and after the earlier of (x) the date such
security is no longer a Registrable Security and (y) expiration of the
Effectiveness Period. The rate of accrual of the Liquidated Damages Amount with
respect to any period



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<PAGE>

shall not exceed the rate provided for in this paragraph notwithstanding the
occurrence of multiple concurrent Events. Following the cure of all Events
requiring the payment by the Company of Liquidated Damages Amounts to the
Holders of Registrable Securities pursuant to this Section, the accrual of
Liquidated Damages Amounts shall cease (without in any way limiting the effect
of any subsequent Event requiring the payment of Liquidated Damages Amount by
the Company).

        The Trustee shall be entitled, on behalf of Holders of Notes, to seek
any available remedy for the enforcement of this Agreement, including for the
payment of any Liquidated Damages Amount. Notwithstanding the foregoing, the
parties agree that the sole damages payable for a violation of the terms of this
Agreement with respect to which liquidated damages are expressly provided shall
be such liquidated damages.

        All of the Company's obligations set forth in this Section 2(e) that are
outstanding with respect to any Registrable Security at the time such security
ceases to be a Registrable Security shall survive until such time as all such
obligations with respect to such security have been satisfied in full
(notwithstanding termination of this Agreement pursuant to Section 8(k)).

        The parties hereto agree that the liquidated damages provided for in
this Section 2(e) constitute a reasonable estimate of the damages that may be
incurred by, and shall be the exclusive monetary remedy available to, Holders of
Registrable Securities by reason of the failure of the Shelf Registration
Statement to be filed or declared effective or available for effecting resales
of Registrable Securities in accordance with the provisions hereof.

        Section 3. Registration Procedures. In connection with the registration
obligations of the Company under Section 2 hereof, the Company shall:

          (a) Prepare and file with the SEC a Shelf Registration Statement or
Shelf Registration Statements on Form S-1 or S-3 or any other appropriate form
under the Securities Act available for the sale of the Registrable Securities by
the Holders thereof in accordance with the intended method or methods of
distribution thereof, and use commercially reasonable efforts to cause each such
Shelf Registration Statement to become effective and remain effective as
provided herein; provided that before filing any Shelf Registration Statement or
Prospectus or any amendments or supplements thereto with the SEC, the Company
shall furnish to the Initial Purchaser and counsel for the Holders and for the
Initial Purchaser (or, if applicable, separate counsel for the Holders) copies
of all such documents proposed to be filed and use commercially reasonable
efforts to reflect in each such document when so filed with the SEC such
comments as the such counsel reasonably shall propose within three (3) Business
Days of the delivery of such copies to the Initial Purchaser and such counsel.



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          (b) Prepare and file with the SEC such amendments and post-effective
amendments to each Shelf Registration Statement as may be necessary to keep such
Shelf Registration Statement continuously effective until the expiration of the
Effectiveness Period; cause the related Prospectus to be supplemented by any
required Prospectus supplement, and as so supplemented to be filed pursuant to
Rule 424 (or any similar provisions then in force) under the Securities Act; and
use commercially reasonable efforts to comply with the provisions of the
Securities Act applicable to it with respect to the disposition of all
securities covered by such Shelf Registration Statement during the Effectiveness
Period in accordance with the intended methods of disposition by the sellers
thereof set forth in such Shelf Registration Statement as so amended or such
Prospectus as so supplemented.

          (c) As promptly as practicable give notice to the Notice Holders, the
Initial Purchaser and counsel for the Holders and for the Initial Purchaser (or,
if applicable, separate counsel for the Holders) (i) when any Prospectus,
Prospectus supplement, Shelf Registration Statement or post-effective amendment
to a Shelf Registration Statement has been filed with the SEC and, with respect
to a Shelf Registration Statement or any post-effective amendment, when the same
has been declared effective, (ii) of any request, following the effectiveness of
the Initial Shelf Registration Statement under the Securities Act, by the SEC or
any other federal or state governmental authority for amendments or supplements
to any Shelf Registration Statement or related Prospectus or for additional
information, (iii) of the issuance by the SEC or any other federal or state
governmental authority of any stop order suspending the effectiveness of any
Shelf Registration Statement or the initiation or threatening of any proceedings
for that purpose, (iv) of the receipt by the Company of any notification with
respect to the suspension of the qualification or exemption from qualification
of any of the Registrable Securities for sale in any jurisdiction or the
initiation or threatening of any proceeding for such purpose, (v) after the
effective date of any Shelf Registration Statement filed pursuant to this
Agreement of the occurrence of (but not the nature of or details concerning) a
Material Event and (vi) of the determination by the Company that a
post-effective amendment to a Shelf Registration Statement will be filed with
the SEC, which notice may, at the discretion of the Company (or as required
pursuant to Section 3(i)), state that it constitutes a Suspension Notice, in
which event the provisions of Section 3(i) shall apply.

          (d) Use commercially reasonable efforts to prevent the issuance of,
and, if issued, to obtain the withdrawal of any order suspending the
effectiveness of a Shelf Registration Statement or the lifting of any suspension
of the qualification (or exemption from qualification) of any of the Registrable
Securities for sale in any jurisdiction in which they have been qualified for
sale, in either case at the earliest possible moment, and provide prompt notice
to each Notice Holder and the Initial Purchaser of the withdrawal of any such
order.

          (e) If requested by the Initial Purchaser or any Notice Holder, as
promptly as practicable incorporate in a Prospectus supplement or post-effective



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<PAGE>

amendment to a Shelf Registration Statement such information as the Initial
Purchaser, such Notice Holder or counsel for the Holders and for the Initial
Purchaser (or, if applicable, separate counsel for the Holders) shall determine
to be required to be included therein by applicable law and make any required
filings of such Prospectus supplement or such post-effective amendment; provided
that the Company shall not be required to take any actions under this Section
3(e) that, in the written opinion of counsel for the Company, are not in
compliance with applicable law.

          (f) As promptly as practicable furnish to each Notice Holder, counsel
for the Holders and for the Initial Purchaser (or, if applicable, separate
counsel for the Holders) and the Initial Purchaser, without charge, at least one
(1) conformed copy of the Shelf Registration Statement and any amendment
thereto, including financial statements but excluding schedules, all documents
incorporated or deemed to be incorporated therein by reference and all exhibits
(unless requested in writing to the Company by such Notice Holder, such counsel
or the Initial Purchaser).

          (g) During the Effectiveness Period, deliver to each Notice Holder,
counsel for the Holders and for the Initial Purchaser (or, if applicable,
separate counsel for the Holders) and the Initial Purchaser, in connection with
any sale of Registrable Securities pursuant to a Shelf Registration Statement,
without charge, as many copies of the Prospectus or Prospectuses relating to
such Registrable Securities (including each preliminary prospectus) and any
amendment or supplement thereto as such Notice Holder and the Initial Purchaser
may reasonably request; and the Company hereby consents (except during such
periods that a Suspension Notice is outstanding and has not been revoked) to the
use of such Prospectus or each amendment or supplement thereto by each Notice
Holder, in connection with any offering and sale of the Registrable Securities
covered by such Prospectus or any amendment or supplement thereto in the manner
set forth therein.

          (h) Prior to any public offering of the Registrable Securities
pursuant to the Shelf Registration Statement, use commercially reasonable
efforts to register or qualify or cooperate with the Notice Holders in
connection with the registration or qualification (or exemption from such
registration or qualification) of such Registrable Securities for offer and sale
under the securities or Blue Sky laws of such jurisdictions within the United
States as any Notice Holder reasonably requests in writing (which request may be
included in the Notice and Questionnaire); prior to any public offering of the
Registrable Securities pursuant to the Shelf Registration Statement, use
commercially reasonable efforts to keep each such registration or qualification
(or exemption therefrom) effective during the Effectiveness Period in connection
with such Notice Holder's offer and sale of Registrable Securities pursuant to
such registration or qualification (or exemption therefrom) and do any and all
other acts or things reasonably necessary or advisable to enable the disposition
in such jurisdictions of such Registrable Securities in the manner set forth in
the relevant Shelf Registration Statement and



                                       10
<PAGE>

the related Prospectus; provided that the Company will not be required to (i)
qualify as a foreign corporation or as a dealer in securities in any
jurisdiction where it would not otherwise be required to qualify but for this
Agreement or (ii) take any action that would subject it to general service of
process in suits or to taxation in any such jurisdiction where it is not then so
subject.

          (i) Upon (A) the issuance by the SEC of a stop order suspending the
effectiveness of the Shelf Registration Statement or the initiation of
proceedings with respect to the Shelf Registration Statement under Section 8(d)
or 8(e) of the Securities Act, (B) the occurrence of any event or the existence
of any fact as a result of which any Shelf Registration Statement shall contain
any untrue statement of a material fact or omit to state any material fact
required to be stated therein or necessary to make the statements therein not
misleading, or any Prospectus shall contain any untrue statement of a material
fact or omit to state any material fact necessary in order to make the
statements therein, in the light of the circumstances under which they were
made, not misleading, or (C) the occurrence or existence of any pending
corporate development that, in the reasonable discretion of the Company, makes
it appropriate to suspend the availability of the Shelf Registration Statement
and the related Prospectus (a "Material Event"), (i) in the case of clause (B)
or (C) above, subject to the next sentence, as promptly as practicable, prepare
and file, if necessary pursuant to applicable law, a post-effective amendment to
such Shelf Registration Statement or a supplement to the related Prospectus or
any document incorporated therein by reference or file any other required
document that would be incorporated by reference into such Shelf Registration
Statement and Prospectus so that such Shelf Registration Statement does not
contain any untrue statement of a material fact or omit to state any material
fact required to be stated therein or necessary to make the statements therein
not misleading, and such Prospectus does not contain any untrue statement of a
material fact or omit to state any material fact necessary in order to make the
statements therein, in the light of the circumstances under which they were
made, not misleading (it being understood that the Company may rely on
information provided by each Notice Holder with respect to such Notice Holder),
as thereafter delivered to the purchasers of the Registrable Securities being
sold thereunder, and, in the case of a post-effective amendment to a Shelf
Registration Statement, subject to the next sentence, use commercially
reasonable efforts to cause it to be declared effective as promptly as is
practicable, and (ii) give notice to the Notice Holders and counsel for the
Holders and for the Initial Purchaser (or, if applicable, separate counsel for
the Holders) that the availability of the Shelf Registration Statement is
suspended (a "Suspension Notice") and, upon receipt of any Suspension Notice,
each Notice Holder agrees not to sell any Registrable Securities pursuant to
such Shelf Registration Statement until such Notice Holder's receipt of copies
of the supplemented or amended Prospectus provided for in clause (i) above, or
until it is advised in writing by the Company that the Prospectus may be used,
and has received copies of any additional or supplemental filings that are
incorporated or deemed incorporated by reference in such Prospectus. The Company
will use



                                       11
<PAGE>

commercially reasonable efforts to ensure that the use of the Prospectus may be
resumed (x) in the case of clause (A) above, as promptly as is practicable, (y)
in the case of clause (B) above, as soon as, in the reasonable judgment of the
Company, the Shelf Registration Statement does not contain any untrue statement
of a material fact or omits to state any material fact required to be stated
therein or necessary to make the statements therein not misleading and the
Prospectus does not contain any untrue statement of a material fact or omits to
state any material fact necessary in order to make the statements therein, in
the light of the circumstances under which they were made, not misleading, and
(z) in the case of clause (C) above, as soon as, in the reasonable discretion of
the Company, such suspension is no longer appropriate. The period during which
the availability of the Shelf Registration Statement and any Prospectus may be
suspended (the "Suspension Period") without the Company incurring any obligation
to pay liquidated damages pursuant to Section 2(e) shall not exceed thirty (30)
days in the aggregate in any three month period or one hundred twenty (120) days
in the aggregate in any twelve (12) month period.

          (j) Make available for inspection during normal business hours by
representatives for the Notice Holders of such Registrable Securities, and any
broker-dealers, attorneys and accountants retained by such Notice Holders, all
relevant financial and other records and pertinent corporate documents and
properties of the Company and its subsidiaries, and cause the appropriate
officers, directors and employees of the Company and its subsidiaries to make
available for inspection during normal business hours all relevant information
reasonably requested by such representatives for the Notice Holders, or any such
broker-dealers, attorneys or accountants in connection with such disposition, in
each case as is customary for similar "due diligence" examinations; provided,
however, that such persons shall, at the Company's request, first agree in
writing with the Company that any information that is reasonably and in good
faith designated by the Company in writing as confidential at the time of
delivery of such information shall be kept confidential by such persons and
shall be used solely for the purposes of exercising rights under this Agreement,
unless (i) disclosure of such information is required by court or administrative
order or is necessary to respond to inquiries of regulatory authorities, (ii)
disclosure of such information is required by law (including any disclosure
requirements pursuant to federal securities laws in connection with the filing
of any Shelf Registration Statement or the use of any Prospectus referred to in
this Agreement), (iii) such information becomes generally available to the
public other than as a result of a disclosure or failure to safeguard by any
such person or (iv) such information becomes available to any such person from a
source other than the Company and such source is not bound by a confidentiality
agreement or is not otherwise under a duty of trust to the Company, and provided
that the foregoing inspection and information gathering shall, to the greatest
extent possible, be coordinated on behalf of all the Notice Holders and the
other parties entitled thereto by the counsel referred to in Section 5.



                                       12
<PAGE>

          (k) Comply with all applicable rules and regulations of the SEC and
make generally available to its securityholders earning statements (which need
not be audited) satisfying the provisions of Section 11(a) of the Securities Act
and Rule 158 thereunder (or any similar rule promulgated under the Securities
Act) no later than 45 days after the end of any 12-month period (or 90 days
after the end of any 12-month period if such period is a fiscal year) commencing
on the first day of the first fiscal quarter of the Company commencing after the
effective date of a Shelf Registration Statement, which statements shall cover
said 12-month periods.

          (l) Cooperate with each Notice Holder to facilitate the timely
preparation and delivery of certificates representing Registrable Securities
sold pursuant to a Shelf Registration Statement, which certificates shall not
bear any restrictive legends, and cause such Registrable Securities to be in
such denominations as are permitted by the Indenture and registered in such
names as such Notice Holder may request in writing at least (2) Business Days
prior to any sale of such Registrable Securities.

          (m) Provide a CUSIP number for all Registrable Securities covered by
each Shelf Registration Statement not later than the effective date of such
Shelf Registration Statement and provide the Trustee and the transfer agent for
the Common Stock with certificates for the Registrable Securities that are in a
form eligible for deposit with The Depository Trust Company.

          (n) Cooperate and assist in any filings required to be made with the
National Association of Securities Dealers, Inc.

          (o) Enter into such customary agreements and take all such other
necessary actions in connection therewith (including those requested by the
holders of a majority of the Registrable Securities being sold) in order to
expedite or facilitate disposition of such Registrable Securities.

          (p) Cause the Indenture to be qualified under the TIA not later than
the effective date of any Shelf Registration Statement; and in connection
therewith, cooperate with the Trustee to effect such changes to the Indenture as
may be required for the Indenture to be so qualified in accordance with the
terms of the TIA and execute, and use commercially reasonable efforts to cause
the Trustee to execute, all documents as may be required to effect such changes,
and all other forms and documents required to be filed with the SEC to enable
the Indenture to be so qualified in a timely manner.

        Section 4. Holder's Obligations. Each Holder agrees, by acquisition of
the Registrable Securities, that no Holder of Registrable Securities shall be
entitled to sell any of such Registrable Securities pursuant to a Shelf
Registration Statement or to receive a Prospectus relating thereto, unless such
Holder has furnished the Company with a Notice and Questionnaire as required
pursuant to Section 2(d) hereof (including the information required to be
included in such



                                       13
<PAGE>

Notice and Questionnaire) and the information set forth in the next sentence.
Each Notice Holder agrees promptly to furnish to the Company all information
required to be disclosed in order to make the information previously furnished
to the Company by such Notice Holder not misleading and any other information
regarding such Notice Holder and the distribution of such Registrable Securities
as the Company may from time to time reasonably request. Any sale of any
Registrable Securities by any Holder shall constitute a representation and
warranty by such Holder that the information relating to such Holder and its
plan of distribution is as set forth in the Prospectus delivered by such Holder
in connection with such disposition, that such Prospectus does not as of the
time of such sale contain any untrue statement of a material fact relating to or
provided by such Holder or its plan of distribution and that such Prospectus
does not as of the time of such sale omit to state any material fact relating to
or provided by such Holder or its plan of distribution necessary in order to
make the statements in such Prospectus, in the light of the circumstances under
which they were made, not misleading.

        Section 5. Registration Expenses. The Company shall bear all fees and
expenses incurred in connection with the performance by the Company of its
obligations under Section 2 and 3 of this Agreement whether or not any of the
Shelf Registration Statements are declared effective. Such fees and expenses
("Registration Expenses") shall include, without limitation, (i) all
registration and filing fees (including, without limitation, fees and expenses
(x) with respect to filings required to be made with the National Association of
Securities Dealers, Inc. and (y) of compliance with federal and state securities
or Blue Sky laws (including, without limitation, reasonable fees and
disbursements of counsel for the Holders in connection with Blue Sky
qualifications of the Registrable Securities under the laws of such
jurisdictions as the Notice Holders of a majority of the Registrable Securities
being sold pursuant to a Shelf Registration Statement may designate), (ii)
printing expenses (including, without limitation, expenses of printing
certificates for Registrable Securities in a form eligible for deposit with The
Depository Trust Company), (iii) duplication and mailing expenses relating to
copies of any Shelf Registration Statement or Prospectus delivered to any
Holders hereunder, (iv) fees and disbursements of counsel for the Company and
the fees and disbursements of one counsel for the Holders in connection with the
Shelf Registration Statement, (v) fees and disbursements of the Trustee and its
counsel and of the registrar and transfer agent for the Common Stock and (vi)
Securities Act liability insurance obtained by the Company in its sole
discretion. In addition, the Company shall pay the internal expenses of the
Company (including, without limitation, all salaries and expenses of officers
and employees performing legal or accounting duties), the expense of any annual
audit, the fees and expenses incurred in connection with the listing by the
Company of the Registrable Securities on any securities exchange on which
similar securities of the Company are then listed and the fees and expenses of
any person, including special experts, retained by the Company.



                                       14
<PAGE>

        Section 6. Indemnification; Contribution.

          (a) The Company agrees to indemnify, defend and hold harmless each
Holder and each person who controls any Holder within the meaning of Section 15
of the Securities Act or Section 20 of the Exchange Act (each, a "Holder
Indemnified Party"), from and against any loss, damage, expense, liability or
claim (including the reasonable cost of investigation) which such Holder
Indemnified Party may incur under the Securities Act, the Exchange Act or
otherwise, insofar as such loss, damage, expense, liability or claim arises out
of or is based upon any untrue statement or alleged untrue statement of a
material fact contained in any Shelf Registration Statement or Prospectus or in
any amendment or supplement thereto or in any preliminary prospectus, or arises
out of or is based upon any omission or alleged omission to state a material
fact required to be stated in any Shelf Registration Statement or in any
amendment or supplement thereto or necessary to make the statements therein not
misleading, or arises out of or is based upon any omission or alleged omission
to state a material fact necessary in order to make the statements made in any
Prospectus or in any amendment or supplement thereto or in any preliminary
prospectus, in the light of the circumstances under which they were made, not
misleading, except insofar as any such loss, damage, expense, liability or claim
arises out of or is based upon any untrue statement or omission or alleged
untrue statement or omission of a material fact contained in, or omitted from,
and in conformity with information furnished in writing by or on behalf of any
Holder to the Company expressly for use therein.

          (b) Each Holder, severally and not jointly, agrees to indemnify,
defend and hold harmless the Company, its directors and officers and any person
who controls the Company within the meaning of Section 15 of the Securities Act
or Section 20 of the Exchange Act (each, a "Company Indemnified Party") from and
against any loss, damage, expense, liability or claim (including the reasonable
cost of investigation) which such Company Indemnified Party may incur under the
Securities Act, the Exchange Act or otherwise, insofar as such loss, damage,
expense, liability or claim arises out of or is based upon any untrue statement
or alleged untrue statement of a material fact contained in information
furnished in writing by or on behalf of such Holder to the Company expressly for
use in any Shelf Registration Statement or Prospectus or in any amendment or
supplement thereto or in any preliminary prospectus, or arises out of or is
based upon any omission or alleged omission to state a material fact required to
be stated in any Shelf Registration Statement or in any amendment or supplement
thereto or necessary to make the statements therein not misleading, or arises
out of or is based upon any omission or alleged omission to state a material
fact necessary in order to make the statements in any Prospectus or in any
amendment or supplement thereto or in any preliminary prospectus, in the light
of the circumstances under which they were made, not misleading, in connection
with such information. In no event shall the liability of any selling Holder of
Registrable Securities hereunder be greater in amount than the dollar amount of



                                       15
<PAGE>

the proceeds received by such Holder upon the sale of the Registrable Securities
pursuant to the Shelf Registration Statement giving rise to such indemnification
obligation.

          (c) If any action, suit or proceeding (each, a "Proceeding") is
brought against any person in respect of which indemnity may be sought pursuant
to either subsection (a) or (b) of this Section 6, such person (the "Indemnified
Party") shall promptly notify the person against whom such indemnity may be
sought (the "Indemnifying Party") in writing of the institution of such
Proceeding and the Indemnifying Party shall assume the defense of such
Proceeding; provided, however, that the omission to notify such Indemnifying
Party shall not relieve such Indemnifying Party from any liability which it may
have to such Indemnified Party or otherwise. Such Indemnified Party shall have
the right to employ its own counsel in any such case, but the fees and expenses
of such counsel shall be at the expense of such Indemnified Party unless the
employment of such counsel shall have been authorized in writing by such
Indemnifying Party in connection with the defense of such Proceeding or such
Indemnifying Party shall not have employed counsel to have charge of the defense
of such Proceeding within 30 days of the receipt of notice thereof or such
Indemnified Party shall have reasonably concluded upon the written advice of
counsel that there may be one or more defenses available to it that are
different from, additional to or in conflict with those available to such
Indemnifying Party (in which case such Indemnifying Party shall not have the
right to direct that portion of the defense of such Proceeding on behalf of the
Indemnified Party, but such Indemnifying Party may employ counsel and
participate in the defense thereof but the fees and expenses of such counsel
shall be at the expense of such Indemnifying Party), in any of which events such
reasonable fees and expenses shall be borne by such Indemnifying Party and paid
as incurred (it being understood, however, that such Indemnifying Party shall
not be liable for the expenses of more than one separate counsel in any one
Proceeding or series of related Proceedings together with reasonably necessary
local counsel representing the Indemnified Parties who are parties to such
action). An Indemnifying Party shall not be liable for any settlement of such
Proceeding effected without the written consent of such Indemnifying Party, but
if settled with the written consent of such Indemnifying Party, such
Indemnifying Party agrees to indemnify and hold harmless an Indemnified Party
from and against any loss or liability by reason of such settlement.
Notwithstanding the foregoing sentence, if at any time an Indemnified Party
shall have requested an Indemnifying Party to reimburse such Indemnified Party
for fees and expenses of counsel as contemplated by the second sentence of this
paragraph, then such Indemnifying Party agrees that it shall be liable for any
settlement of any Proceeding effected without its written consent if (i) such
settlement is entered into more than 60 Business Days after receipt by such
Indemnifying Party of the aforesaid request, (ii) such Indemnifying Party shall
not have reimbursed such Indemnified Party in accordance with such request prior
to the date of such settlement and (iii) such Indemnified Party shall have given
such Indemnifying Party at least 30 days' prior notice of its intention to
settle. No Indemnifying



                                       16
<PAGE>

Party shall, without the prior written consent of any Indemnified Party, effect
any settlement of any pending or threatened Proceeding in respect of which such
Indemnified Party is or could have been a party and indemnity could have been
sought hereunder by such Indemnified Party, unless such settlement includes an
unconditional release of such Indemnified Party from all liability on claims
that are the subject matter of such Proceeding and does not include an admission
of fault, culpability or a failure to act, by or on behalf of such Indemnified
Party.

          (d) If the indemnification provided for in this Section 6 is
unavailable to an Indemnified Party under subsections (a) and (b) of this
Section 6 in respect of any losses, damages, expenses, liabilities or claims
referred to therein, then each applicable Indemnifying Party, in lieu of
indemnifying such Indemnified Party, shall contribute to the amount paid or
payable by such Indemnified Party as a result of such losses, damages, expenses,
liabilities or claims (i) in such proportion as is appropriate to reflect the
relative benefits received by the Company on the one hand and the Holders on the
other hand from the offering of the Registrable Securities or (ii) if the
allocation provided by clause (i) above is not permitted by applicable law, in
such proportion as is appropriate to reflect not only the relative benefits
referred to in clause (i) above but also the relative fault of the Company on
the one hand and of the Holders on the other in connection with the statements
or omissions which resulted in such losses, damages, expenses, liabilities or
claims, as well as any other relevant equitable considerations. The relative
fault of the Company on the one hand and of the Holders on the other shall be
determined by reference to, among other things, whether the untrue statement or
alleged untrue statement of a material fact or omission or alleged omission
relates to information supplied by the Company or by the Holders and the
parties' relative intent, knowledge, access to information and opportunity to
correct or prevent such statement or omission. The amount paid or payable by a
party as a result of the losses, damages, expenses, liabilities and claims
referred to above shall be deemed to include any reasonable legal or other fees
or expenses reasonably incurred by such party in connection with investigating
or defending any Proceeding.

          (e) The Company and the Holders agree that it would not be just and
equitable if contribution pursuant to this Section 6 were determined by pro rata
allocation or by any other method of allocation which does not take account of
the equitable considerations referred to in subsection (d) above.
Notwithstanding the provisions of this Section 6, no Holder shall be required to
contribute any amount in excess of the amount by which the total price at which
the Registrable Securities sold by it were offered to the public exceeds the
amount of any damages which it has otherwise been required to pay by reason of
such untrue or alleged untrue statement or omission or alleged omission. No
person guilty of fraudulent misrepresentation (within the meaning of Section
11(f) of the Securities Act) shall be entitled to contribution from any person
who was not guilty of such fraudulent misrepresentation. The Holders' respective
obligations to contribute pursuant to this Section 6 are several in proportion
to the respective



                                       17
<PAGE>

amount of Registrable Securities they have sold pursuant to a Shelf Registration
Statement, and not joint. The remedies provided for in this Section 6 are not
exclusive and shall not limit any rights or remedies which may otherwise be
available to any indemnified party at law or in equity.

          (f) The indemnity and contribution provisions contained in this
Section 6 shall remain operative and in full force and effect regardless of (i)
any termination of this Agreement, (ii) any investigation made by or on behalf
of any Holder or any person controlling any Holder, or the Company, or the
Company's officers or directors or any person controlling the Company and (iii)
the sale of any Registrable Security by any Holder.

        Section 7. Information Requirements. (a) The Company covenants that, if
at any time before the end of the Effectiveness Period it is not subject to the
reporting requirements of the Exchange Act, it will cooperate with any Holder of
Registrable Securities and take such further action as any Holder of Registrable
Securities may reasonably request in writing (including, without limitation,
making such representations as any such Holder may reasonably request), all to
the extent required from time to time to enable such Holder to sell Registrable
Securities without registration under the Securities Act within the limitation
of the exemptions provided by Rule 144, Rule 144A, Regulation S and Regulation D
under the Securities Act and customarily taken in connection with sales pursuant
to such exemptions. Upon the written request of any Holder of Registrable
Securities, the Company shall deliver to such Holder a written statement as to
whether it has complied with such filing requirements, unless such a statement
has been included in the Company's most recent report filed with the SEC
pursuant to Section 13 or Section 15(d) of Exchange Act. Notwithstanding the
foregoing, nothing in this Section 7 shall be deemed to require the Company to
register any of its securities (other than the Common Stock) under any section
of the Exchange Act.

          (b) The Company shall file the reports required to be filed by it
under the Exchange Act and shall comply with all other requirements set forth in
the instructions to Form S-1 or Form S-3, as the case may be, in order to allow
the Company to be eligible to file registration statements on Form S-1 or Form
S-3.

        Section 8. Miscellaneous.

          (a) No Conflicting Agreements. The Company is not, as of the date
hereof, a party to, nor shall it, on or after the date of this Agreement, enter
into, any agreement with respect to its securities that conflicts with the
rights granted to the Holders of Registrable Securities in this Agreement. The
Company represents and warrants that the rights granted to the Holders of
Registrable Securities hereunder do not in any way conflict with the rights
granted to the holders of the Company's securities under any other agreements.



                                       18
<PAGE>

          (b) Amendments and Waivers. The provisions of this Agreement,
including the provisions of this sentence, may not be amended, modified or
supplemented, and waivers or consents to departures from the provisions hereof
may not be given, unless the Company has obtained the written consent of Holders
of a majority of the then outstanding Underlying Common Stock constituting
Registrable Securities (with Holders of Notes deemed to be the Holders, for
purposes of this Section, of the number of outstanding shares of Underlying
Common Stock into which such Notes are or would be convertible as of the date on
which such consent is requested). Notwithstanding the foregoing, a waiver or
consent to depart from the provisions hereof with respect to a matter that
relates exclusively to the rights of Holders of Registrable Securities whose
securities are being sold pursuant to a Shelf Registration Statement and that
does not directly or indirectly affect the rights of other Holders of
Registrable Securities may be given by Holders of at least a majority of the
Registrable Securities being sold by such Holders pursuant to such Shelf
Registration Statement; provided that the provisions of this sentence may not be
amended, modified, or supplemented except in accordance with the provisions of
the immediately preceding sentence. Each Holder of Registrable Securities
outstanding at the time of any such amendment, modification, supplement, waiver
or consent or thereafter shall be bound by any such amendment, modification,
supplement, waiver or consent effected pursuant to this Section 8(b), whether or
not any notice, writing or marking indicating such amendment, modification,
supplement, waiver or consent appears on the Registrable Securities or is
delivered to such Holder.

          (c) Notices. All notices and other communications provided for or
permitted hereunder shall be made in writing by hand delivery, by telecopy, by
courier guaranteeing overnight delivery or by first-class mail, return receipt
requested, and shall be deemed given (i) when made, if made by hand delivery,
(ii) upon confirmation, if made by facsimile, (iii) one (1) Business Day after
being deposited with such courier, if made by overnight courier or (iv) on the
date indicated on the notice of receipt, if made by first-class mail, to the
parties as follows:

        (x) if to a Holder of Registrable Securities, at the most current
address given by such Holder to the Company in a Notice and Questionnaire or any
amendment thereto;

        (y) if to the Company, to:

             Documentum, Inc.
             6801 Koll Center Parkway
             Pleasanton, CA  94566-7047
             Attention: Sayed Darwish
             Fax  No.:  (925) 600-6693



                                       19
<PAGE>

        (z) if to the Initial Purchaser, to:

             UBS Warburg LLC
             299 Park Avenue
             New York, New York 10171
             Attention: Legal Department
             Fax No.: 212-821-4042

             with a copy to (for informational purposes only):

             UBS Warburg LLC
             1285 Avenue of the Americas
             New York, New York 10019
             Attention: Syndicate Department
             Fax No.: 212-713-3460


or to such other address as such person may have furnished to the other persons
identified in this Section 8(c) in writing in accordance herewith.

          (d) Approval of Holders. Whenever the consent or approval of Holders
of a specified percentage of Registrable Securities is required hereunder,
Registrable Securities held by the Company or its affiliates (as such term is
defined in Rule 405 under the Securities Act) (other than the Initial Purchaser
or subsequent Holders of Registrable Securities if such subsequent Holders are
deemed to be such affiliates solely by reason of their holdings of such
Registrable Securities) shall not be counted in determining whether such consent
or approval was given by the Holders of such required percentage.

          (e) Successors and Assigns. Any person who purchases any Registrable
Securities from the Initial Purchaser or any Holder shall be deemed, for
purposes of this Agreement, to be an assignee of the Initial Purchaser or such
Holder, as the case may be. This Agreement shall inure to the benefit of and be
binding upon the successors and assigns of each of the parties and shall inure
to the benefit of and be binding upon each Holder of any Registrable Securities.

          (f) Counterparts. This Agreement may be executed in any number of
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be original and all of which taken together
shall constitute one and the same agreement.

          (g) Headings. The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

          (h) Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED
IN ACCORDANCE WITH, THE LAWS OF THE



                                       20
<PAGE>

STATE OF NEW YORK, WITHOUT REGARD TO CONFLICTS OF LAWS PRINCIPLES THEREOF.

          (i) Severability. If any term, provision, covenant or restriction of
this Agreement is held to be invalid, illegal, void or unenforceable, the
remainder of the terms, provisions, covenants and restrictions set forth herein
shall remain in full force and effect and shall in no way be affected, impaired
or invalidated thereby, and the parties hereto shall use commercially reasonable
efforts to find and employ an alternative means to achieve the same or
substantially the same result as that contemplated by such term, provision,
covenant or restriction, it being intended that all of the rights and privileges
of the parties shall be enforceable to the fullest extent permitted by law.

          (j) Entire Agreement. This Agreement is intended by the parties as a
final expression of their agreement and is intended to be a complete and
exclusive statement of the agreement and understanding of the parties hereto in
respect of the subject matter contained herein and the registration rights
granted by the Company with respect to the Registrable Securities. Except as
provided in the Purchase Agreement, there are no restrictions, promises,
warranties or undertakings, other than those set forth or referred to herein,
with respect to the registration rights granted by the Company with respect to
the Registrable Securities. This Agreement supersedes all prior agreements and
undertakings among the parties with respect to such registration rights. No
party hereto shall have any rights, duties or obligations other than those
specifically set forth in this Agreement.

          (k) Termination. This Agreement and the obligations of the parties
hereunder shall terminate upon the end of the Effectiveness Period, except for
any liabilities or obligations under Section 4, 5 or 6 hereof and the
obligations to make payments of and provide for liquidated damages under Section
2(e) hereof to the extent such damages accrue prior to the end of the
Effectiveness Period, each of which shall remain in effect in accordance with
its terms.



                                       21
<PAGE>

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


                                          DOCUMENTUM, INC.


                                          By:   /s/  BOB L. COREY
                                              ---------------------------------
                                              Name:  Bob L. Corey
                                              Title: Executive Vice President
                                                     and Chief Financial Officer



                                       22
<PAGE>

Confirmed and accepted as of the date first above written:


UBS WARBURG LLC


By:   /s/  TONY TROUSSET
   --------------------------------
    Name:  Tony Trousset
    Title: Executive Director


By:   /s/  GLENN CHEN
   --------------------------------
    Name:  Glenn Chen
    Title: Associate Director




                                       23