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Appendix A. GNU Free Documentation License

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 combi 

nation 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 "Ac 

knowledgements", and any sections entitled "Dedications." You must delete all sections entitled

"Endorsements."

7. 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.

8. AGGREGATION WITH INDEPENDENT WORKS

A compilation of the Document or its derivatives with other separate and independent docu 

ments 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.

9. TRANSLATION

Translation is considered a kind of modification, so you may distribute translations of the Docu 

ment 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 Invari 

ant 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.

10. 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 Docu 

ment 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.

11. FUTURE REVISIONS OF THIS LICENSE