GNU GENERAL PUBLIC LICENSE
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0. Definitions.
"This License" refers to version 3 of the GNU General Public License.
"Copyright" also means copyright-like laws that apply to other kinds of works, such as semiconductor
masks.
"The Program" refers to any copyrightable work licensed under this License. Each licensee is
addressed as "you". "Licensees" and "recipients" may be individuals or organizations.
To "modify" a work means to copy from or adapt all or part of the work in a fashion requiring
copyright permission, other than the making of an exact copy. The resulting work is called a
"modified version" of the earlier work or a work "based on" the earlier work.
A "covered work" means either the unmodified Program or a work based on the Program.
To "propagate" a work means to do anything with it that, without permission, would make you directly
or secondarily liable for infringement under applicable copyright law, except executing it on a
computer or modifying a private copy. Propagation includes copying, distribution (with or without
modification), making available to the public, and in some countries other activities as well.
To "convey" a work means any kind of propagation that enables other parties to make or receive
copies. Mere interaction with a user through a computer network, with no transfer of a copy, is not
conveying.
An interactive user interface displays "Appropriate Legal Notices" to the extent that it includes a
convenient and prominently visible feature that (1) displays an appropriate copyright notice, and (2)
tells the user that there is no warranty for the work (except to the extent that warranties are
provided), that licensees may convey the work under this License, and how to view a copy of this
License. If the interface presents a list of user commands or options, such as a menu, a prominent
item in the list meets this criterion.
1. Source Code.
The "source code" for a work means the preferred form of the work for making modifications to it.
"Object code" means any non-source form of a work.
A "Standard Interface" means an interface that either is an official standard defined by a recognized
standards body, or, in the case of interfaces specified for a particular programming language, one
that is widely used among developers working in that language.
The "System Libraries" of an executable work include anything, other than the work as a whole, that
(a) is included in the normal form of packaging a Major Component, but which is not part of that
Major Component, and (b) serves only to enable use of the work with that Major Component, or to
implement a Standard Interface for which an implementation is available to the public in source code
form. A "Major Component", in this context, means a major essential component (kernel, window
system, and so on) of the specific operating system (if any) on which the executable work runs, or a
compiler used to produce the work, or an object code interpreter used to run it.
The "Corresponding Source" for a work in object code form means all the source code needed to
generate, install, and (for an executable work) run the object code and to modify the work, including
scripts to control those activities. However, it does not include the work's System Libraries, or
general-purpose tools or generally available free programs which are used unmodified in performing
those activities but which are not part of the work. For example, Corresponding Source includes
interface definition files associated with source files for the work, and the source code for shared
libraries and dynamically linked subprograms that the work is specifically designed to require, such
as by intimate data communication or control flow between those subprograms and other parts of the
work.
The Corresponding Source need not include anything that users can regenerate automatically from
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