db4o.license.txt

GNU GENERAL PUBLIC LICENSE
Version 2, June 1991

Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is 
not allowed.

Preamble

The licenses for most software are designed to take away your freedom to share and change it. By contrast, 
the GNU General Public License is intended to guarantee your freedom to share and change free software--to 
make sure the software is free for all its users. This General Public License applies to most of the Free 
Software Foundation's software and to any other program whose authors commit to using it. (Some other Free 
Software Foundation software is covered by the GNU Library General Public License instead.) You can apply it 
to your programs, too.

When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are 
designed to make sure that you have the freedom to distribute copies of free software (and charge for this 
service if you wish), that you receive source code or can get it if you want it, that you can change the 
software or use pieces of it in new free programs; and that you know you can do these things.

To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask 
you to surrender the rights. These restrictions translate to certain responsibilities for you if you 
distribute copies of the software, or if you modify it.

For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the 
recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. 
And you must show them these terms so they know their rights.

We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which 
gives you legal permission to copy, distribute and/or modify the software.

Also, for each author's protection and ours, we want to make certain that everyone understands that there 
is no warranty for this free software. If the software is modified by someone else and passed on, we want 
its recipients to know that what they have is not the original, so that any problems introduced by others
will not reflect on the original authors' reputations.

Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that 
redistributors of a free program will individually obtain patent licenses, in effect making the program 
proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free 
use or not licensed at all.

The precise terms and conditions for copying, distribution and modification follow.

GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

0. This License applies to any program or other work which contains a notice placed by the copyright holder 
saying it may be distributed under the terms of this General Public License. The "Program", below, refers 
to any such program or work, and a "work based on the Program" means either the Program or any derivative 
work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim 
or with modifications and/or translated into another language. (Hereinafter, translation is included without 
limitation in the term "modification".) Each licensee is addressed as "you".

Activities other than copying, distribution and modification are not covered by this License; they are 
outside its scope. The act of running the Program is not restricted, and the output from the Program is 
covered only if its contents constitute a work based on the Program (independent of having been made by 
running the Program). Whether that is true depends on what the Program does.

1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any 
medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright 
notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence 
of any warranty; and give any other recipients of the Program a copy of this License along with the Program.

You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty 
protection in exchange for a fee.

2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the 
Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that 
you also meet all of these conditions:

    a) You must cause the modified files to carry prominent notices stating that you changed the files and 
    the date of any change.

    b) You must cause any work that you distribute or publish, that in whole or in part contains or is 
    derived from the Program or any part thereof, to be licensed as a whole at no charge to all third 
    parties under the terms of this License.

    c) If the modified program normally reads commands interactively when run, you must cause it, when 
    started running for such interactive use in the most ordinary way, to print or display an announcement 
    including an appropriate copyright notice and a notice that there is no warranty (or else, saying that 
    you provide a warranty) and that users may redistribute the program under these conditions, and telling 
    the user how to view a copy of this License. (Exception: if the Program itself is interactive but does 
    not normally print such an announcement, your work based on the Program is not required to print an 
    announcement.) 

These requirements apply to the modified work as a whole. If identifiable sections of that work are not 
derived from the Program, and can be reasonably considered independent and separate works in themselves, 
then this License, and its terms, do not apply to those sections when you distribute them as separate works. 
But when you distribute the same sections as part of a whole which is a work based on the Program, the 
distribution of the whole must be on the terms of this License, whose permissions for other licensees extend 
to the entire whole, and thus to each and every part regardless of who wrote it.

Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by 
you; rather, the intent is to exercise the right to control the distribution of derivative or collective works 
based on the Program.

In addition, mere aggregation of another work not based on the Program with the Program (or with a work based 
on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope 
of this License.

3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or 
executable form under the terms of Sections 1 and 2 above provided that you also do one of the following:

    a) Accompany it with the complete corresponding machine-readable source code, which must be distributed 
    under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or,

    b) Accompany it with a written offer, valid for at least three years, to give any third party, for a 
    charge no more than your cost of physically performing source distribution, a complete machine-readable 
    copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a 
    medium customarily used for software interchange; or,

    c) Accompany it with the information you received as to the offer to distribute corresponding source code. 
    (This alternative is allowed only for noncommercial distribution and only if you received the program in 
    object code or executable form with such an offer, in accord with Subsection b above.) 

The source code for a work means the preferred form of the work for making modifications to it. For an 
executable work, complete source code means all the source code for all modules it contains, plus any
associated interface definition files, plus the scripts used to control compilation and installation of the 
executable. However, as a special exception, the source code distributed need not include anything that is 
normally distributed (in either source or binary form) with the major components (compiler, kernel, and so 
on) of the operating system on which the executable runs, unless that component itself accompanies the 
executable.

If distribution of executable or object code is made by offering access to copy from a designated place, then 
offering equivalent access to copy the source code from the same place counts as distribution of the source 
code, even though third parties are not compelled to copy the source along with the object code.

4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this 
License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will 
automatically terminate your rights under this License. However, parties who have received copies, or rights, 
from you under this License will not have their licenses terminated so long as such parties remain in full 
compliance.

5. You are not required to accept this License, since you have not signed it. However, nothing else grants 
you permission to modify or distribute the Program or its derivative works. These actions are prohibited by 
law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based
 on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for 
 copying, distributing or modifying the Program or works based on it.

6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically 
receives a license from the original licensor to copy, distribute or modify the Program subject to these terms 
and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted 
herein. You are not responsible for enforcing compliance by third parties to this License.

7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not 
limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) 
that contradict the conditions of this License, they do not excuse you from the conditions of this License. 
If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other 
pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a 
patent license would not permit royalty-free redistribution of the Program by all those who receive copies 
directly or indirectly through you, then the only way you could satisfy both it and this License would be to 
refrain entirely from distribution of the Program.

If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance 
of the section is intended to apply and the section as a whole is intended to apply in other circumstances.

It is not the purpose of this section to induce you to infringe any patents or other property right claims or 
to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the 
free software distribution system, which is implemented by public license practices. Many people have made 
generous contributions to the wide range of software distributed through that system in reliance on consistent 
application of that system; it is up to the author/donor to decide if he or she is willing to distribute 
software through any other system and a licensee cannot impose that choice.

This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this 
License.

8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by 
copyrighted interfaces, the original copyright holder who places the Program under this License may add an 
explicit geographical distribution limitation excluding those countries, so that distribution is permitted 
only in or among countries not thus excluded. In such case, this License incorporates the limitation as if 
written in the body of this License.

9. The Free Software Foundation may publish revised and/or new versions of the General Public License from 
time to time. Such new versions will be similar in spirit to the present version, but may differ in detail 
to address new problems or concerns.

Each version is given a distinguishing version number. If the Program specifies a version number of this 
License which applies to it and "any later version", you have the option of following the terms and conditions 
either of that version or of any later version published by the Free Software Foundation. If the Program does 
not specify a version number of this License, you may choose any version ever published by the Free Software 
Foundation.

10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are 
different, write to the author to ask for permission. For software which is copyrighted by the Free Software 
Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will 
be guided by the two goals of preserving the free status of all derivatives of our free software and of 
promoting the sharing and reuse of software generally.

NO WARRANTY

11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT 
PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER 
PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, 
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE 
ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, 
YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.

12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY
OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE 
THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR 
OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

END OF TERMS AND CONDITIONS

How to Apply These Terms to Your New Programs

If you develop a new program, and you want it to be of the greatest possible use to the public, the best way 
to achieve this is to make it free software which everyone can redistribute and change under these terms.

To do so, attach the following notices to the program. It is safest to attach them to the start of each source 
file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" 
line and a pointer to where the full notice is found.

    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year> <name of author>

    This program is free software; you can redistribute it and/or modify it under the terms of the GNU General 
    Public License as published by the Free Software Foundation; either version 2 of the License, or (at your 
    option) any later version.

    This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the 
    implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 
    for more details.

    You should have received a copy of the GNU General Public License along with this program; if not, write 
    to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 

<Also add information on how to contact you by electronic and paper mail.>

If the program is interactive, make it output a short notice like this when it starts in an interactive mode:

    Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; 
    for details type `show w'. This is free software, and you are welcome to redistribute it under certain 
    conditions; type `show c' for details. 

The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License.
 Of course, the commands you use may be called something other than `show w' and `show c'; they could even be 
 mouse-clicks or menu items--whatever suits your program.

You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright 
disclaimer" for the program, if necessary. Here is a sample; alter the names:

    Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes 
    at compilers) written by James Hacker.

    <signature of Ty Coon>, 1 April 1989
    Ty Coon, President of Vice 

This General Public License does not permit incorporating your program into proprietary programs. If your 
program is a subroutine library, you may consider it more useful to permit linking proprietary applications 
with the library. If this is what you want to do, use the GNU Library General Public License instead of this 
License.

Legal advisors do not agree on the exact definition of what actions triggers your software to become 
available under the GPL as well. To avoid ambiguity, db4objects provides an explicit GPL Interpretation 
Policy which is in line with the Free Software Foundation's (FSF) stance. If you license the db4o software 
under the GPL, you must follow this interpretation.