Hello All, 

I quoted Allard Hoeve March 2008: 


We'd like to try to package Zimbra for Debian. 

Zimbra is at http://www.zimbra.com/. It is distributed according to the Yahoo 
Public License, which you can read at 
http://www.zimbra.com/license/yahoo_public_license_1.1.html Is the Yahoo Public 
License DFSG-compatible? 

I haven't found anything that made me believe otherwise but the license does 
state for example: "Subject to the terms and conditions of this Agreement, 
__Yahoo!__ hereby grants to You, under any and all of its copyright interest in 
and to the Software, a royalty-free, non-exclusive, non-transferable license to 
copy, modify, compile, execute, and distribute the Software and Modifications." 

What does the debian-legal community think? 

Thanks! 

Here is the full text: 

Yahoo! Public License, Version 1.1 (YPL) 


This Yahoo! Public License (this " Agreement ") is a legal agreement that 
describes the terms under which Yahoo! Inc., a Delaware corporation having its 
principal place of business at 701 First Avenue, Sunnyvale, California 94089 (" 
Yahoo !") will provide software to you via download or otherwise (" Software 
"). By using the Software, you, an individual or an entity (" You ") agree to 
the terms of this Agreement. 

In consideration of the mutual promises and upon the terms and conditions set 
forth below, the parties agree as follows: 

    1. Grant of Copyright License 
        • 1.1 - Subject to the terms and conditions of this Agreement, Yahoo! 
hereby grants to You, under any and all of its copyright interest in and to the 
Software, a royalty-free, non-exclusive, non-transferable license to copy, 
modify, compile, execute, and distribute the Software and Modifications. For 
the purposes of this Agreement, any change to, addition to, or abridgement of 
the Software made by You is a " Modification ;" however, any file You add to 
the Software that does not contain any part of the Software is not a 
"Modification." 
        • 1.2 - If You are an individual acting on behalf of a corporation or 
other entity, Your use of the Software or any Modification is subject to Your 
having the authority to bind such corporation or entity to this Agreement. 
Providing copies to persons within such corporation or entity is not considered 
distribution for purposes of this Agreement. 
        • 1.3 - For the Software or any Modification You distribute in source 
code format, You must do so only under the terms of this Agreement, and You 
must include a complete copy of this Agreement with Your distribution. With 
respect to any Modification You distribute in source code format, the terms of 
this Agreement will apply to You in the same way those terms apply to Yahoo! 
with respect to the Software. In other words, when You are distributing 
Modifications under this Agreement, You "stand in the shoes" of Yahoo! in terms 
of the rights You grant and how the terms and conditions apply to You and the 
licensees of Your Modifications. Notwithstanding the foregoing, when You "stand 
in the shoes" of Yahoo!, You are not subject to the jurisdiction provision 
under Section 7, which requires all disputes under this Agreement to be subject 
to the jurisdiction of federal or state courts of northern California. 
        • 1.4 - For the Software or any Modification You distribute in compiled 
or object code format, You must also provide recipients with access to the 
Software or Modification in source code format along with a complete copy of 
this Agreement. The distribution of the Software or Modifications in compiled 
or object code format may be under a license of Your choice, provided that You 
are in compliance with the terms of this Agreement. In addition, You must make 
absolutely clear that any license terms applying to such Software or 
Modification that differ from this Agreement are offered by You alone and not 
by Yahoo!, and that such license does not restrict recipients from exercising 
rights in the source code to the Software granted by Yahoo! under this 
Agreement or rights in the source code to any Modification granted by You as 
described in Section 1.3. 
        • 1.5 - This Agreement does not limit Your right to distribute files 
that are entirely Your own work (i.e., which do not incorporate any portion of 
the Software and are not Modifications) under any terms You choose. 
    2. Support 
        • Yahoo! has no obligation to provide technical support or updates to 
You. Nothing in this Agreement requires Yahoo! to enter into any license with 
You for any other edition of the Software. 
    3. Intellectual Property Rights 
        • 3.1 - Except for the license expressly granted under copyright in 
Section 1.1, no rights, licenses or forbearances are granted or may arise in 
relation to this Agreement whether expressly, by implication, exhaustion, 
estoppel or otherwise. All rights, including all intellectual property rights, 
that are not expressly granted under this Agreement are hereby reserved. 
        • 3.2 - In any copy of the Software or in any Modification you create, 
You must retain and reproduce, any and all copyright, patent, trademark, and 
attribution notices that are included in the Software in the same form as they 
appear in the Software. This includes the preservation of attribution notices 
in the form of trademarks or logos that exist within a user interface of the 
Software. 
        • 3.3 - This license does not grant You rights to use any party's name, 
logo, or trademarks, except solely as necessary to comply with Section 3.2. 
    4. Disclaimer of Warranties 
        • THE SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND. 
YAHOO! MAKES NO WARRANTIES, WHETHER EXPRESS, IMPLIED, OR STATUTORY REGARDING OR 
RELATING TO THE SOFTWARE. SPECIFICALLY, YAHOO! DOES NOT WARRANT THAT THE 
SOFTWARE WILL BE ERROR FREE OR WILL PERFORM IN AN UNINTERRUPTED MANNER. TO THE 
GREATEST EXTENT ALLOWED BY LAW, YAHOO! SPECIFICALLY DISCLAIMS ALL IMPLIED 
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (EVEN IF YAHOO! 
HAD BEEN INFORMED OF SUCH PURPOSE), AND NONINFRINGEMENT WITH RESPECT TO THE 
SOFTWARE, ANY MODIFICATIONS THERETO AND WITH RESPECT TO THE USE OF THE 
FOREGOING. 
    5. Limitation of Liability 
        • IN NO EVENT WILL YAHOO! BE LIABLE FOR ANY DIRECT, INDIRECT, 
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES OF ANY KIND (INCLUDING 
WITHOUT LIMITATION LOSS OF PROFITS, LOSS OF USE, BUSINESS INTERRUPTION, LOSS OF 
DATA, COST OF COVER) IN CONNECTION WITH OR ARISING OUT OF OR RELATING TO THE 
FURNISHING, PERFORMANCE OR USE OF THE SOFTWARE OR ANY OTHER RIGHTS GRANTED 
HEREUNDER, WHETHER ALLEGED AS A BREACH OF CONTRACT OR TORTIOUS CONDUCT, 
INCLUDING NEGLIGENCE, AND EVEN IF YAHOO! HAS BEEN ADVISED OF THE POSSIBILITY OF 
SUCH DAMAGES. 
    6. Term and Termination 
        • 6.1 - This Agreement will continue in effect unless and until 
terminated earlier pursuant to this Section 6. 
        • 6.2 - In the event You violate the terms of this Agreement, Yahoo! 
may terminate this Agreement. 
        • 6.3 - All licenses granted hereunder shall terminate upon the 
termination of this Agreement. Termination will be in addition to any rights 
and remedies available to Yahoo! at law or equity or under this Agreement. 
        • 6.4 - Termination of this Agreement will not affect the provisions 
regarding reservation of rights (Section 3.1), provisions disclaiming or 
limiting Yahoo!'s liability (Sections 4 and 5), Termination (Section 6) or 
Miscellaneous (Section 7), which provisions will survive termination of this 
Agreement. 
    7. Miscellaneous 
        • This Agreement contains the entire agreement of the parties with 
respect to the subject matter of this Agreement and supersedes all previous 
communications, representations, understandings and agreements, either oral or 
written, between the parties with respect to said subject matter. The 
relationship of the parties hereunder is that of independent contractors, and 
this Agreement will not be construed as creating an agency, partnership, joint 
venture or any other form of legal association between the parties. If any 
term, condition, or provision in this Agreement is found to be invalid, 
unlawful or unenforceable to any extent, this Agreement will be construed in a 
manner that most closely effectuates the intent of this Agreement. Such invalid 
term, condition or provision will be severed from the remaining terms, 
conditions and provisions, which will continue to be valid and enforceable to 
the fullest extent permitted by law. This Agreement will be interpreted and 
construed in accordance with the laws of the State of California and the United 
States of America, without regard to conflict of law principles. The U.N. 
Convention on Contracts for the International Sale of Goods shall not apply to 
this Agreement. All disputes arising out of this Agreement involving Yahoo! or 
any of its subsidiaries shall be subject to the jurisdiction of the federal or 
state courts of northern California, with venue lying in Santa Clara County, 
California. No rights may be assigned, no obligations may be delegated, and 
this Agreement may not be transferred by You, in whole or in part, whether 
voluntary or by operation of law, including by way of sale of assets, merger or 
consolidation, without the prior written consent of Yahoo!, and any purported 
assignment, delegation or transfer without such consent shall be void ab 
initio. Any waiver of the provisions of this Agreement or of a party's rights 
or remedies under this Agreement must be in writing to be effective. Failure, 
neglect or delay by a party to enforce the provisions of this Agreement or its 
rights or remedies at any time, will not be construed or be deemed to be a 
waiver of such party's rights under this Agreement and will not in any way 
affect the validity of the whole or any part of this Agreement or prejudice 
such party's right to take subsequent action. 

Regards, 

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