Learn more about how Mambo is licensed and how this affects you.
Mambo is released under the GNU General Public license (GNU GPL).The
GNU GPL provides for a person or persons to distribute Mambo for a fee,
but not actually charging for the software itself, because Mambo is
free. Mambo is free to share and change, but if you do change it in
anyway, can you also change the license and make it commercial? No! The
whole GPL is devoted to ensuring this does not happen. Copyright, a
much more refined and stringent law will prevent this as well.
So with regard to Mambo, the GPL and copyright:
You MAY distribute it and charge for that service. You MAY change it, add design and content to it and you MAY charge for that. You may NOT alter the license and you must NOT alter the copyright. You do NOT have to show a 'Powered by Mambo' graphic, as it not a copyright notice.
In other words, you must NOT pretend that Mambo is yours, and you must NOT charge people for Mambo.
Use Mambo to empower yourself and your clients by taking away the
'Black Magic' that surrounds putting content on the internet. Charge
for the value you add and not for the hard work that Miro, the Mambo
Development Team and the Mambo community have put into it.
Mambo is "free" software released under the GNU General Public License (GPL).
word "free'' has two legitimate general meanings; it can refer either
to freedom or to price. When we speak of "free software'', we're
talking about freedom, not price. (Think of "free speech'', not "free
Free software is a matter of the users' freedom
to run, copy, distribute, study, change and improve the software. More
precisely, it refers to four kinds of freedom, for the users of the
- The freedom to run the program, for any purpose.
- The freedom to study how the program works, and adapt it to your needs
- Access to the source code is a precondition for this.
- The freedom to redistribute copies so you can help your neighbour.
- The freedom to improve the program, and release your improvements to the public, so that the whole community benefits.
- Access to the source code is a precondition for this
1. What license is Mambo released under?
Mambo is released under the GNU GPL. A copy of this is included with your copy of Mambo and can also be found at http://www.fsf.org/licenses/gpl.html. Unofficial translations can also be found at http://www.fsf.org/licenses/translations.html.
2. Who owns the copyright to Mambo?
copyright to Mambo is held by Miro International Pty Ltd. Miro were the
original authors of Mambo and continue to actively support the project.
3. Are there any restrictions to your use of Mambo?
The GNU GPL grants you the freedom to use the software for whatever purpose you see fit. 4. May I charge money for Mambo?
GPL allows everyone the freedom to do this. The right to charge money
to distribute Mambo is part of the definition of "free" software.
people think of "selling software'', they usually imagine doing it the
way most companies do it: making the software proprietary rather than
free. So to avoid ambiguity you may you may charge to distribute the
software and any other service you provide along the way. You may not
charge for the software itself.
Remember if someone pays your fee the GPL also gives him or her the freedom to pass on the software with or without a fee.
5. May I remove "powered by Mambo, Copyright Miro etc" from the footer?
Yes you can although we would hope that you would retain it as a badge of honour.
6. May I remove the "copyright" statements from the source code to Mambo?
No, you must keep all copyright notices and credits in the source code.
7. Does the GPL mean that my website content is also GPL?
The copyright and license of Mambo does not cover the content that you
create. Using Mambo does not place any restrictions, legally, on the
license or copyright you use for the content of your website.
8. I have modified Mambo for my own web site. Do I have to release these modifications?
GPL permits anyone to make a modified version for their own use without
the requirement to distribute it or pass on those changes to others.
9. I have made a modification (hack) to the Mambo core code. Do I have to release it under the GPL?
you chose to distribute your modifications to others it must be
released under the same terms that you received the original code. So
your modifications must be released under the GPL. You may of course in
this case modify the headers for the source code to include your own
copyright statement. If you do so you must clearly annotate in the
source code your amendments, changes or additions.
10. I have written a Component, Module, Template for Mambo. Do I have to release it under the GPL?
No The GPL allows you to write your own extensions for Mambo and to release those extensions under whatever license you chose.
I have written a Component, Module, Template for Mambo and released it
under the GPL and I charge a fee for it, but website X is giving it
away for free.
If someone pays your fee the GPL also
gives him or her the freedom to pass on the software with or without a
fee. Placing a restriction on someone's use of GPL licensed software is
in breach of the GPL itself.
12. May I purchase a copy of Mambo, which has the copyright statements removed?
Although other GPL products may be available in this way Mambo is not.
13. I believe person A is in breach of the GPL what should I do?
You should report it. First check all the facts that you can and then report it by sending an e-mail to
14. Who has the power to enforce the GNU GPL license of Mambo?
the copyright holder, Miro International Pty Ltd, has the power to do
this. If the Mambo Development Team finds, or is made aware of, a
breach of the GPL they will report it to Miro for them to take any
Miro takes copyright infringement very seriously and will prosecute to the full extent of the law.
Website X is using, or offering, my non-GPL Component, Module, Template
without my permission, or in breach of its license, can you help me?
this is not within the remit or responsibility of Mambo we are willing
to act as intermediaries in this on your behalf. In most cases these
situations arise out of simple misunderstandings and can be settled
amicably. You should e-mail full details to
document refers to the software program Mambo, Version 4.x and all
subsequent versions, released under the GNU General Public License and
copyright Miro International Pty Ltd.
This document is subject to additions, modifications and other changes at any time without notice.
lawyer has not prepared this document. You should consult a lawyer
experienced in copyright, licensing and intellectual property for
Document Rev. 1.4 - 17th August 2004