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+# AsciiDoc
+
+Since version `2.0.0`, GitBook can also accept AsciiDoc as an input format.
+
+Please refer to the [AsciiDoc Syntax Quick Reference](http://asciidoctor.org/docs/asciidoc-syntax-quick-reference/) for more informations about the format.
+
+Just like for markdown, GitBook is using some special files to extract structures: `README.adoc`, `SUMMARY.adoc`, `LANGS.adoc` and `GLOSSARY.adoc`.
+
+### README.adoc
+
+This is the main entry of your book: the introduction. This file is **non optional**.
+
+### SUMMARY.adoc
+
+This file defines the list of chapters and subchapters. Just like [for markdown](./pages.md), the `SUMMARY.adoc`'s format is simply a list of links, the name of the link is used as the chapter's name, and the target is a path to that chapter's file.
+
+Subchapters are defined simply by adding a nested list to a parent chapter.
+
+```asciidoc
+= Summary
+
+. link:chapter-1/README.adoc[Chapter 1]
+.. link:chapter-1/ARTICLE1.adoc[Article 1]
+.. link:chapter-1/ARTICLE2.adoc[Article 2]
+... link:chapter-1/ARTICLE-1-2-1.adoc[Article 1.2.1]
+. link:chapter-2/README.adoc[Chapter 2]
+. link:chapter-3/README.adoc[Chapter 3]
+. link:chapter-4/README.adoc[Chapter 4]
+.. Unfinished article
+. Unfinished Chapter
+```
+
+### LANGS.adoc
+
+For [Multi-Languages](./languages.md) books, this file is used to define the different supported languages and translations.
+
+This file is following the same syntax as the `SUMMARY.adoc`:
+
+```asciidoc
+= Languages
+
+. link:en/[English]
+. link:fr/[French]
+```
+
+### GLOSSARY.adoc
+
+This file is used to define terms. [See the glossary section](./lexicon.md).
+
+```asciidoc
+= Glossary
+
+== Magic
+Sufficiently advanced technology, beyond the understanding of the observer producing a sense of wonder.
+
+== PHP
+An atrocious language, invented for the sole purpose of inflicting pain and suffering amongst the programming wizards of this world.
+```
+
+