Location: PHPKode > projects > Stack > stack-dev/licence.txt
Copyright (c) 2005 Christopher J Sangwin.



  GNU GENERAL PUBLIC LICENSE               Version 2, June 1991



Copyright (C) 1989, 1991 Free Software Foundation, Inc. 675 Mass

Ave, Cambridge, MA 02139, 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

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