GNU Lesser General Public License
=================================

_Version 3, 29 June 2007_  
_Copyright © 2007 Free Software Foundation, Inc. &lt;<http://fsf.org/>&gt;_

Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.

This version of the GNU Lesser General Public License incorporates the terms and conditions of version 3 of the GNU
General Public License, supplemented by the additional permissions listed below.

### 0. Additional Definitions

As used herein, “this License” refers to version 3 of the GNU Lesser General Public License, and the “GNU GPL” refers to
version 3 of the GNU General Public License.

“The Library” refers to a covered work governed by this License, other than an Application or a Combined Work as defined
below.

An “Application” is any work that makes use of an interface provided by the Library, but which is not otherwise based on
the Library. Defining a subclass of a class defined by the Library is deemed a mode of using an interface provided by
the Library.

A “Combined Work” is a work produced by combining or linking an Application with the Library. The particular version of
the Library with which the Combined Work was made is also called the “Linked Version”.

The “Minimal Corresponding Source” for a Combined Work means the Corresponding Source for the Combined Work, excluding
any source code for portions of the Combined Work that, considered in isolation, are based on the Application, and not
on the Linked Version.

The “Corresponding Application Code” for a Combined Work means the object code and/or source code for the Application,
including any data and utility programs needed for reproducing the Combined Work from the Application, but excluding the
System Libraries of the Combined Work.

### 1. Exception to Section 3 of the GNU GPL

You may convey a covered work under sections 3 and 4 of this License without being bound by section 3 of the GNU GPL.

### 2. Conveying Modified Versions

If you modify a copy of the Library, and, in your modifications, a facility refers to a function or data to be supplied
by an Application that uses the facility (other than as an argument passed when the facility is invoked), then you may
convey a copy of the modified version:

* **a)** under this License, provided that you make a good faith effort to ensure that, in the event an Application does
  not supply the function or data, the facility still operates, and performs whatever part of its purpose remains
  meaningful, or

* **b)** under the GNU GPL, with none of the additional permissions of this License applicable to that copy.

### 3. Object Code Incorporating Material from Library Header Files

The object code form of an Application may incorporate material from a header file that is part of the Library. You may
convey such object code under terms of your choice, provided that, if the incorporated material is not limited to
numerical parameters, data structure layouts and accessors, or small macros, inline functions and templates
(ten or fewer lines in length), you do both of the following:

* **a)** Give prominent notice with each copy of the object code that the Library is used in it and that the Library and
  its use are covered by this License.
* **b)** Accompany the object code with a copy of the GNU GPL and this license document.

### 4. Combined Works

You may convey a Combined Work under terms of your choice that, taken together, effectively do not restrict modification
of the portions of the Library contained in the Combined Work and reverse engineering for debugging such modifications,
if you also do each of the following:

* **a)** Give prominent notice with each copy of the Combined Work that the Library is used in it and that the Library
  and its use are covered by this License.

* **b)** Accompany the Combined Work with a copy of the GNU GPL and this license document.

* **c)** For a Combined Work that displays copyright notices during execution, include the copyright notice for the
  Library among these notices, as well as a reference directing the user to the copies of the GNU GPL and this license
  document.

* **d)** Do one of the following:
    - **0)** Convey the Minimal Corresponding Source under the terms of this License, and the Corresponding Application
      Code in a form suitable for, and under terms that permit, the user to recombine or relink the Application with a
      modified version of the Linked Version to produce a modified Combined Work, in the manner specified by section 6
      of the GNU GPL for conveying Corresponding Source.
    - **1)** Use a suitable shared library mechanism for linking with the Library. A suitable mechanism is one that **(
      a)** uses at run time a copy of the Library already present on the user's computer system, and **(b)** will
      operate properly with a modified version of the Library that is interface-compatible with the Linked Version.

* **e)** Provide Installation Information, but only if you would otherwise be required to provide such information under
  section 6 of the GNU GPL, and only to the extent that such information is necessary to install and execute a modified
  version of the Combined Work produced by recombining or relinking the Application with a modified version of the
  Linked Version. (If you use option **4d0**, the Installation Information must accompany the Minimal Corresponding
  Source and Corresponding Application Code. If you use option **4d1**, you must provide the Installation Information in
  the manner specified by section 6 of the GNU GPL for conveying Corresponding Source.)

### 5. Combined Libraries

You may place library facilities that are a work based on the Library side by side in a single library together with
other library facilities that are not Applications and are not covered by this License, and convey such a combined
library under terms of your choice, if you do both of the following:

* **a)** Accompany the combined library with a copy of the same work based on the Library, uncombined with any other
  library facilities, conveyed under the terms of this License.
* **b)** Give prominent notice with the combined library that part of it is a work based on the Library, and explaining
  where to find the accompanying uncombined form of the same work.

### 6. Revised Versions of the GNU Lesser General Public License

The Free Software Foundation may publish revised and/or new versions of the GNU Lesser 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 Library as you received it specifies that a certain
numbered version of the GNU Lesser General Public License “or any later version” applies to it, you have the option of
following the terms and conditions either of that published version or of any later version published by the Free
Software Foundation. If the Library as you received it does not specify a version number of the GNU Lesser General
Public License, you may choose any version of the GNU Lesser General Public License ever published by the Free Software
Foundation.

If the Library as you received it specifies that a proxy can decide whether future versions of the GNU Lesser General
Public License shall apply, that proxy's public statement of acceptance of any version is permanent authorization for
you to choose that version for the Library.