Wikia

Doom Wiki

Doom Source License

Talk0
2,911pages on
this wiki

The Doom Source License (or DSL) is the original source code license under which the Doom source code was released in late 1997. The Doom source was later re-released under the GNU GPL. As the license cannot be revoked, the Doom source is essentially dual licensed under the DSL and the GPL.

The DSL is significantly more restrictive than the GNU GPL, and as such is incompatible with it. For example, any form of commercial exploitation is forbidden. Heavy restrictions apply to the distribution of copies of the source code; the license grants permission only for the distribution of portions of the code for "educational use". The DSL is not an Open Source license (under the Open Source Definition) or a Free Software license.

Despite these restrictions, some source port authors nonetheless choose the DSL over the GPL for their ports. One reason for this is that the DSL does not include the copyleft provisions that the GPL includes, which requires the source code of any derivative version to be released. This is used as justification by the authors of source ports such as ZDaemon and Skulltag, who keep their source code secret.

In the past, another reason to use the DSL was that the GNU GPL was incompatible with the Raven source code license under which the Heretic and Hexen sources were originally released, while the DSL is compatible. By using the DSL, it was possible to use the Raven source code while avoiding infringing upon the GPL. This is no longer an issue as the Raven source code was re-released under the GPL.

Confusingly, source ports which use the DSL are not Open Source, even if the source code is still available; this is because the DSL does not meet the requirements for what is considered "open" under the Open Source Definition. Similarly, DSL source ports are also non-Free Software.

License text Edit

This is a verbatim copy of the Doom license text for reference purposes.

      LIMITED USE SOFTWARE LICENSE AGREEMENT

        This Limited Use Software License Agreement (the "Agreement")
is a legal agreement between you, the end-user, and Id Software, Inc.
("ID").  By downloading or purchasing the software material, which
includes source code (the "Source Code"), artwork data, music and
software tools (collectively, the "Software"), you are agreeing to
be bound by the terms of this Agreement.  If you do not agree to the
terms of this Agreement, promptly destroy the Software you may have
downloaded or copied.

ID SOFTWARE LICENSE

1.      Grant of License.  ID grants to you the right to use the
Software.  You have no ownership or proprietary rights in or to the 
Software, or the Trademark. For purposes of this section, "use" means 
loading the Software into RAM, as well as installation on a hard disk
or other storage device. The Software, together with any archive copy
thereof, shall be destroyed when no longer used in accordance with 
this Agreement, or when the right to use the Software is terminated.  
You agree that the Software will not be shipped, transferred or 
exported into any country in violation of the U.S. Export 
Administration Act (or any other law governing such matters) and that 
you will not utilize, in any other manner, the Software in violation 
of any applicable law.

2.      Permitted Uses.  For educational purposes only, you, the
end-user, may use portions of the Source Code, such as particular
routines, to develop your own software, but may not duplicate the
Source Code, except as noted in paragraph 4.  The limited right
referenced in the preceding sentence is hereinafter referred to as
"Educational Use."  By so exercising the Educational Use right you
shall not obtain any ownership, copyright, proprietary or other
interest in or to the Source Code, or any portion of the Source
Code.  You may dispose of your own software in your sole discretion.
With the exception of the Educational Use right, you may not
otherwise use the Software, or an portion of the Software, which
includes the Source Code, for commercial gain.

3.      Prohibited Uses:  Under no circumstances shall you, the
end-user, be permitted, allowed or authorized to commercially exploit
the Software. Neither you nor anyone at your direction shall do any
of the following acts with regard to the Software, or any portion
thereof:

        Rent;

        Sell;

        Lease;

        Offer on a pay-per-play basis;

        Distribute for money or any other consideration; or

        In any other manner and through any medium whatsoever
commercially exploit or use for any commercial purpose.

Notwithstanding the foregoing prohibitions, you may commercially
exploit the software you develop by exercising the Educational Use 
right, referenced in paragraph 2. hereinabove.

4.      Copyright.  The Software and all copyrights related thereto 
(including all characters and other images generated by the Software
or depicted in the Software) are owned by ID and is protected by
United States  copyright laws and international treaty provisions.  
Id shall retain exclusive ownership and copyright in and to the
Software and all portions of the Software and you shall have no 
ownership or other proprietary interest in such materials. You must
treat the Software like any other copyrighted material. You may not
otherwise reproduce, copy or disclose to others, in whole or in any
part, the Software.  You may not copy the written materials
accompanying the Software.  You agree to use your best efforts to
see that any user of the Software licensed hereunder complies with
this Agreement.

5.      NO WARRANTIES.  ID DISCLAIMS ALL WARRANTIES, BOTH EXPRESS
IMPLIED, INCLUDING BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT
TO THE SOFTWARE.  THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL
RIGHTS.  YOU MAY HAVE OTHER RIGHTS WHICH VARY FROM JURISDICTION TO
JURISDICTION.  ID DOES NOT WARRANT THAT THE OPERATION OF THE SOFTWARE
WILL BE UNINTERRUPTED, ERROR FREE OR MEET YOUR SPECIFIC REQUIREMENTS.
THE WARRANTY SET FORTH ABOVE IS IN LIEU OF ALL OTHER EXPRESS
WARRANTIES WHETHER ORAL OR WRITTEN.  THE AGENTS, EMPLOYEES, 
DISTRIBUTORS, AND DEALERS OF ID ARE NOT AUTHORIZED TO MAKE 
MODIFICATIONS TO THIS WARRANTY, OR ADDITIONAL WARRANTIES ON BEHALF
OF ID. 

        Exclusive Remedies.  The Software is being offered to you
free of any charge.  You agree that you have no remedy against ID, its
affiliates, contractors, suppliers, and agents for loss or damage 
caused by any defect or failure in the Software regardless of the form
of action, whether in contract, tort, includinegligence, strict
liability or otherwise, with regard to the Software.  This Agreement
shall be construed in accordance with and governed by the laws of the
State of Texas.  Copyright and other proprietary matters will be
governed by United States laws and international treaties.  IN ANY 
CASE, ID SHALL NOT BE LIABLE FOR LOSS OF DATA, LOSS OF PROFITS, LOST
SAVINGS, SPECIAL, INCIDENTAL, CONSEQUENTIAL, INDIRECT OR OTHER
SIMILAR DAMAGES ARISING FROM BREACH OF WARRANTY, BREACH OF CONTRACT,
NEGLIGENCE, OR OTHER LEGAL THEORY EVEN IF ID OR ITS AGENT HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, OR FOR ANY CLAIM BY ANY
OTHER PARTY. Some jurisdictions do not allow the exclusion or
limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to you.

Around Wikia's network

Random Wiki