GNU Free Documentation License Version 1.1, March 2000 

Copyright (C) 2000 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.0. Preamble

The purpose of this License is to make a manual, textbook, or other written 
document "free" in the sense of freedom: to assure everyone the effective 
freedom to copy and redistribute it, with or without modifying it, either 
commercially or noncommercially. Secondarily, this License preserves for the 
author and publisher a way to get credit for their work, while not being 
considered responsible for modifications made by others.

This License is a kind of "copyleft", which means that derivative works of the 
document must themselves be free in the same sense. It complements the GNU 
General Public License, which is a copyleft license designed for free software.

We have designed this License in order to use it for manuals for free 
software, because free software needs free documentation: a free program 
should come with manuals providing the same freedoms that the software does. 
But this License is not limited to software manuals; it can be used for any 
textual work, regardless of subject matter or whether it is published as a 
printed book. We recommend this License principally for works whose purpose is 
instruction or reference.

1. Applicability And Definitions

This License applies to any manual or other work that contains a notice placed 
by the copyright holder saying it can be distributed under the terms of this 
License. The "Document", below, refers to any such manual or work. Any member 
of the public is a licensee, and is addressed as "you".

A "Modified Version" of the Document means any work containing the Document or 
a portion of it, either copied verbatim, or with modifications and/or 
translated into another language.

A "Secondary Section" is a named appendix or a front-matter section of the 
Document that deals exclusively with the relationship of the publishers or 
authors of the Document to the Document's overall subject (or to related 
matters) and contains nothing that could fall directly within that overall 
subject. (For example, if the Document is in part a textbook of mathematics, a 
Secondary Section may not explain any mathematics.) The relationship could be 
a matter of historical connection with the subject or with related matters, or 
of legal, commercial, philosophical, ethical or political position regarding 
them.

The "Invariant Sections" are certain Secondary Sections whose titles are 
designated, as being those of Invariant Sections, in the notice that says that 
the Document is released under this License.

The "Cover Texts" are certain short passages of text that are listed, as 
Front-Cover Texts or Back-Cover Texts, in the notice that says that the 
Document is released under this License.

A "Transparent" copy of the Document means a machine-readable copy, 
represented in a format whose specification is available to the general 
public, whose contents can be viewed and edited directly and straightforwardly 
with generic text editors or (for images composed of pixels) generic paint 
programs or (for drawings) some widely available drawing editor, and that is 
suitable for input to text formatters or for automatic translation to a 
variety of formats suitable for input to text formatters. A copy made in an 
otherwise Transparent file format whose markup has been designed to thwart or 
discourage subsequent modification by readers is not Transparent. A copy that 
is not "Transparent" is called "Opaque".

Examples of suitable formats for Transparent copies include plain ASCII 
without markup, Texinfo input format, LaTeX input format, SGML or XML using a 
publicly available DTD, and standard-conforming simple HTML designed for human 
modification. Opaque formats include PostScript, PDF, proprietary formats that 
can be read and edited only by proprietary word processors, SGML or XML for 
which the DTD and/or processing tools are not generally available, and the 
machine-generated HTML produced by some word processors for output purposes 
only.

The "Title Page" means, for a printed book, the title page itself, plus such 
following pages as are needed to hold, legibly, the material this License 
requires to appear in the title page. For works in formats which do not have 
any title page as such, "Title Page" means the text near the most prominent 
appearance of the work's title, preceding the beginning of the body of the 
text.

2. Verbatim Copying

You may copy and distribute the Document in any medium, either commercially or 
noncommercially, provided that this License, the copyright notices, and the 
license notice saying this License applies to the Document are reproduced in 
all copies, and that you add no other conditions whatsoever to those of this 
License. You may not use technical measures to obstruct or control the reading 
or further copying of the copies you make or distribute. However, you may 
accept compensation in exchange for copies. If you distribute a large enough 
number of copies you must also follow the conditions in section 3.

You may also lend copies, under the same conditions stated above, and you may 
publicly display copies.

3. Copying In Quantity

If you publish printed copies of the Document numbering more than 100, and the 
Document's license notice requires Cover Texts, you must enclose the copies in 
covers that carry, clearly and legibly, all these Cover Texts: Front-Cover 
Texts on the front cover, and Back-Cover Texts on the back cover. Both covers 
must also clearly and legibly identify you as the publisher of these copies. 
The front cover must present the full title with all words of the title 
equally prominent and visible. You may add other material on the covers in 
addition. Copying with changes limited to the covers, as long as they preserve 
the title of the Document and satisfy these conditions, can be treated as 
verbatim copying in other respects.

If the required texts for either cover are too voluminous to fit legibly, you 
should put the first ones listed (as many as fit reasonably) on the actual 
cover, and continue the rest onto adjacent pages.

If you publish or distribute Opaque copies of the Document numbering more than 
100, you must either include a machine-readable Transparent copy along with 
each Opaque copy, or state in or with each Opaque copy a publicly-accessible 
computer-network location containing a complete Transparent copy of the 
Document, free of added material, which the general network-using public has 
access to download anonymously at no charge using public-standard network 
protocols. If you use the latter option, you must take reasonably prudent 
steps, when you begin distribution of Opaque copies in quantity, to ensure 
that this Transparent copy will remain thus accessible at the stated location 
until at least one year after the last time you distribute an Opaque copy 
(directly or through your agents or retailers) of that edition to the public.

It is requested, but not required, that you contact the authors of the 
Document well before redistributing any large number of copies, to give them a 
chance to provide you with an updated version of the Document.

4. Modifications

You may copy and distribute a Modified Version of the Document under the 
conditions of sections 2 and 3 above, provided that you release the Modified 
Version under precisely this License, with the Modified Version filling the 
role of the Document, thus licensing distribution and modification of the 
Modified Version to whoever possesses a copy of it. In addition, you must do 
these things in the Modified Version:

A. Use in the Title Page (and on the covers, if any) a title distinct from 
that of the Document, and from those of previous versions (which should, if 
there were any, be listed in the History section of the Document). You may use 
the same title as a previous version if the original publisher of that version 
gives permission.

B. List on the Title Page, as authors, one or more persons or entities 
responsible for authorship of the modifications in the Modified Version, 
together with at least five of the principal authors of the Document (all of 
its principal authors, if it has less than five).

C. State on the Title page the name of the publisher of the Modified Version, 
as the publisher.

D. Preserve all the copyright notices of the Document.

E. Add an appropriate copyright notice for your modifications adjacent to the 
other copyright notices.

F. Include, immediately after the copyright notices, a license notice giving 
the public permission to use the Modified Version under the terms of this 
License, in the form shown in the Addendum below.

G. Preserve in that license notice the full lists of Invariant Sections and 
required Cover Texts given in the Document's license notice.

H. Include an unaltered copy of this License.

I. Preserve the section entitled "History", and its title, and add to it an 
item stating at least the title, year, new authors, and publisher of the 
Modified Version as given on the Title Page. If there is no section entitled 
"History" in the Document, create one stating the title, year, authors, and 
publisher of the Document as given on its Title Page, then add an item 
describing the Modified Version as stated in the previous sentence.

J. Preserve the network location, if any, given in the Document for public 
access to a Transparent copy of the Document, and likewise the network 
locations given in the Document for previous versions it was based on. These 
may be placed in the "History" section. You may omit a network location for a 
work that was published at least four years before the Document itself, or if 
the original publisher of the version it refers to gives permission.

K. In any section entitled "Acknowledgements" or "Dedications", preserve the 
section's title, and preserve in the section all the substance and tone of 
each of the contributor acknowledgements and/or dedications given therein.

L. Preserve all the Invariant Sections of the Document, unaltered in their 
text and in their titles. Section numbers or the equivalent are not considered 
part of the section titles.

M. Delete any section entitled "Endorsements". Such a section may not be 
included in the Modified Version.

N. Do not retitle any existing section as "Endorsements" or to conflict in 
title with any Invariant Section.

If the Modified Version includes new front-matter sections or appendices that 
qualify as Secondary Sections and contain no material copied from the 
Document, you may at your option designate some or all of these sections as 
invariant. To do this, add their titles to the list of Invariant Sections in 
the Modified Version's license notice. These titles must be distinct from any 
other section titles.

You may add a section entitled "Endorsements", provided it contains nothing 
but endorsements of your Modified Version by various parties--for example, 
statements of peer review or that the text has been approved by an 
organization as the authoritative definition of a standard.

You may add a passage of up to five words as a Front-Cover Text, and a passage 
of up to 25 words as a Back-Cover Text, to the end of the list of Cover Texts 
in the Modified Version. Only one passage of Front-Cover Text and one of 
Back-Cover Text may be added by (or through arrangements made by) any one 
entity. If the Document already includes a cover text for the same cover, 
previously added by you or by arrangement made by the same entity you are 
acting on behalf of, you may not add another; but you may replace the old one, 
on explicit permission from the previous publisher that added the old one.

The author(s) and publisher(s) of the Document do not by this License give 
permission to use their names for publicity for or to assert or imply 
endorsement of any Modified Version.

5. Combining Documents

You may combine the Document with other documents released under this License, 
under the terms defined in section 4 above for modified versions, provided 
that you include in the combination all of the Invariant Sections of all of 
the original documents, unmodified, and list them all as Invariant Sections of 
your combined work in its license notice.

The combined work need only contain one copy of this License, and multiple 
identical Invariant Sections may be replaced with a single copy. If there are 
multiple Invariant Sections with the same name but different contents, make 
the title of each such section unique by adding at the end of it, in 
parentheses, the name of the original author or publisher of that section if 
known, or else a unique number. Make the same adjustment to the section titles 
in the list of Invariant Sections in the license notice of the combined work.

In the combination, you must combine any sections entitled "History" in the 
various original documents, forming one section entitled "History"; likewise 
combine any sections entitled "Acknowledgements", and any sections entitled 
"Dedications". You must delete all sections entitled "Endorsements."

6. Collections Of Documents

You may make a collection consisting of the Document and other documents 
released under this License, and replace the individual copies of this License 
in the various documents with a single copy that is included in the 
collection, provided that you follow the rules of this License for verbatim 
copying of each of the documents in all other respects.

You may extract a single document from such a collection, and distribute it 
individually under this License, provided you insert a copy of this License 
into the extracted document, and follow this License in all other respects 
regarding verbatim copying of that document.

7. Aggregation With Independent Works

A compilation of the Document or its derivatives with other separate and 
independent documents or works, in or on a volume of a storage or distribution 
medium, does not as a whole count as a Modified Version of the Document, 
provided no compilation copyright is claimed for the compilation. Such a 
compilation is called an "aggregate", and this License does not apply to the 
other self-contained works thus compiled with the Document, on account of 
their being thus compiled, if they are not themselves derivative works of the 
Document.

If the Cover Text requirement of section 3 is applicable to these copies of 
the Document, then if the Document is less than one quarter of the entire 
aggregate, the Document's Cover Texts may be placed on covers that surround 
only the Document within the aggregate. Otherwise they must appear on covers 
around the whole aggregate.

8. Translation

Translation is considered a kind of modification, so you may distribute 
translations of the Document under the terms of section 4. Replacing Invariant 
Sections with translations requires special permission from their copyright 
holders, but you may include translations of some or all Invariant Sections in 
addition to the original versions of these Invariant Sections. You may include 
a translation of this License provided that you also include the original 
English version of this License. In case of a disagreement between the 
translation and the original English version of this License, the original 
English version will prevail.

9. Termination

You may not copy, modify, sublicense, or distribute the Document except as 
expressly provided for under this License. Any other attempt to copy, modify, 
sublicense or distribute the Document 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.

10. Future Revisions Of This License

The Free Software Foundation may publish new, revised versions of the GNU Free 
Documentation 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. See http:///www.gnu.org/copyleft/.

Each version of the License is given a distinguishing version number. If the 
Document specifies that a particular numbered version of this License "or any 
later version" applies to it, you have the option of following the terms and 
conditions either of that specified version or of any later version that has 
been published (not as a draft) by the Free Software Foundation. If the 
Document does not specify a version number of this License, you may choose any 
version ever published (not as a draft) by the Free Software Foundation.
