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Appendix A. GNU Free Documentation License

A "Transparent" copy of the Document means a machine readable copy, represented in a for 

mat 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 pix 

els) 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 suit 

able 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, Tex 

info 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 pro 

cessors, 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.

3. VERBATIM COPYING

You may copy and distribute the Document in any medium, either commercially or noncom 

mercially, 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 con 

ditions 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.

4. 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