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+# Markdown: Syntax
+
+A nested readme !
+
+- [Overview](#overview)
+ - [Philosophy](#philosophy)
+ - [Inline HTML](#html)
+ - [Automatic Escaping for Special Characters](#autoescape)
+- [Block Elements](#block)
+ - [Paragraphs and Line Breaks](#p)
+ - [Headers](#header)
+ - [Blockquotes](#blockquote)
+ - [Lists](#list)
+ - [Code Blocks](#precode)
+ - [Horizontal Rules](#hr)
+- [Span Elements](#span)
+ - [Links](#link)
+ - [Emphasis](#em)
+ - [Code](#code)
+ - [Images](#img)
+- [Miscellaneous](#misc)
+ - [Backslash Escapes](#backslash)
+ - [Automatic Links](#autolink)
+
+**Note:** This document is itself written using Markdown; you
+can [see the source for it by adding '.text' to the URL](/projects/markdown/syntax.text).
+
+---
+
+## Overview
+
+### Philosophy
+
+Markdown is intended to be as easy-to-read and easy-to-write as is feasible.
+
+Readability, however, is emphasized above all else. A Markdown-formatted
+document should be publishable as-is, as plain text, without looking
+like it's been marked up with tags or formatting instructions. While
+Markdown's syntax has been influenced by several existing text-to-HTML
+filters -- including [Setext](http://docutils.sourceforge.net/mirror/setext.html), [atx](http://www.aaronsw.com/2002/atx/), [Textile](http://textism.com/tools/textile/), [reStructuredText](http://docutils.sourceforge.net/rst.html),
+[Grutatext](http://www.triptico.com/software/grutatxt.html), and [EtText](http://ettext.taint.org/doc/) -- the single biggest source of
+inspiration for Markdown's syntax is the format of plain text email.
+
+## Block Elements
+
+### Paragraphs and Line Breaks
+
+A paragraph is simply one or more consecutive lines of text, separated
+by one or more blank lines. (A blank line is any line that looks like a
+blank line -- a line containing nothing but spaces or tabs is considered
+blank.) Normal paragraphs should not be indented with spaces or tabs.
+
+The implication of the "one or more consecutive lines of text" rule is
+that Markdown supports "hard-wrapped" text paragraphs. This differs
+significantly from most other text-to-HTML formatters (including Movable
+Type's "Convert Line Breaks" option) which translate every line break
+character in a paragraph into a `<br />` tag.
+
+When you _do_ want to insert a `<br />` break tag using Markdown, you
+end a line with two or more spaces, then type return.
+
+### Headers
+
+Markdown supports two styles of headers, [Setext] [1] and [atx] [2].
+
+Optionally, you may "close" atx-style headers. This is purely
+cosmetic -- you can use this if you think it looks better. The
+closing hashes don't even need to match the number of hashes
+used to open the header. (The number of opening hashes
+determines the header level.)
+
+### Blockquotes
+
+Markdown uses email-style `>` characters for blockquoting. If you're
+familiar with quoting passages of text in an email message, then you
+know how to create a blockquote in Markdown. It looks best if you hard
+wrap the text and put a `>` before every line:
+
+> This is a blockquote with two paragraphs. Lorem ipsum dolor sit amet,
+> consectetuer adipiscing elit. Aliquam hendrerit mi posuere lectus.
+> Vestibulum enim wisi, viverra nec, fringilla in, laoreet vitae, risus.
+>
+> Donec sit amet nisl. Aliquam semper ipsum sit amet velit. Suspendisse
+> id sem consectetuer libero luctus adipiscing.
+
+Markdown allows you to be lazy and only put the `>` before the first
+line of a hard-wrapped paragraph:
+
+> This is a blockquote with two paragraphs. Lorem ipsum dolor sit amet,
+> consectetuer adipiscing elit. Aliquam hendrerit mi posuere lectus.
+> Vestibulum enim wisi, viverra nec, fringilla in, laoreet vitae, risus.
+
+> Donec sit amet nisl. Aliquam semper ipsum sit amet velit. Suspendisse
+> id sem consectetuer libero luctus adipiscing.
+
+Blockquotes can be nested (i.e. a blockquote-in-a-blockquote) by
+adding additional levels of `>`:
+
+> This is the first level of quoting.
+>
+> > This is nested blockquote.
+>
+> Back to the first level.
+
+Blockquotes can contain other Markdown elements, including headers, lists,
+and code blocks:
+
+> ## This is a header.
+>
+> 1. This is the first list item.
+> 2. This is the second list item.
+>
+> Here's some example code:
+>
+> return shell_exec("echo $input | $markdown_script");
+
+Any decent text editor should make email-style quoting easy. For
+example, with BBEdit, you can make a selection and choose Increase
+Quote Level from the Text menu.
+
+### Lists
+
+Markdown supports ordered (numbered) and unordered (bulleted) lists.
+
+Unordered lists use asterisks, pluses, and hyphens -- interchangably
+-- as list markers:
+
+- Red
+- Green
+- Blue
+
+is equivalent to:
+
+- Red
+- Green
+- Blue
+
+and:
+
+- Red
+- Green
+- Blue
+
+Ordered lists use numbers followed by periods:
+
+1. Bird
+2. McHale
+3. Parish
+
+It's important to note that the actual numbers you use to mark the
+list have no effect on the HTML output Markdown produces. The HTML
+Markdown produces from the above list is:
+
+If you instead wrote the list in Markdown like this:
+
+1. Bird
+1. McHale
+1. Parish
+
+or even:
+
+3. Bird
+1. McHale
+1. Parish
+
+you'd get the exact same HTML output. The point is, if you want to,
+you can use ordinal numbers in your ordered Markdown lists, so that
+the numbers in your source match the numbers in your published HTML.
+But if you want to be lazy, you don't have to.
+
+To make lists look nice, you can wrap items with hanging indents:
+
+- Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
+ Aliquam hendrerit mi posuere lectus. Vestibulum enim wisi,
+ viverra nec, fringilla in, laoreet vitae, risus.
+- Donec sit amet nisl. Aliquam semper ipsum sit amet velit.
+ Suspendisse id sem consectetuer libero luctus adipiscing.
+
+But if you want to be lazy, you don't have to:
+
+- Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
+ Aliquam hendrerit mi posuere lectus. Vestibulum enim wisi,
+ viverra nec, fringilla in, laoreet vitae, risus.
+- Donec sit amet nisl. Aliquam semper ipsum sit amet velit.
+ Suspendisse id sem consectetuer libero luctus adipiscing.
+
+List items may consist of multiple paragraphs. Each subsequent
+paragraph in a list item must be indented by either 4 spaces
+or one tab:
+
+1. This is a list item with two paragraphs. Lorem ipsum dolor
+ sit amet, consectetuer adipiscing elit. Aliquam hendrerit
+ mi posuere lectus.
+
+ Vestibulum enim wisi, viverra nec, fringilla in, laoreet
+ vitae, risus. Donec sit amet nisl. Aliquam semper ipsum
+ sit amet velit.
+
+2. Suspendisse id sem consectetuer libero luctus adipiscing.
+
+It looks nice if you indent every line of the subsequent
+paragraphs, but here again, Markdown will allow you to be
+lazy:
+
+- This is a list item with two paragraphs.
+
+ This is the second paragraph in the list item. You're
+
+ only required to indent the first line. Lorem ipsum dolor
+ sit amet, consectetuer adipiscing elit.
+
+- Another item in the same list.
+
+To put a blockquote within a list item, the blockquote's `>`
+delimiters need to be indented:
+
+- A list item with a blockquote:
+
+ > This is a blockquote
+ > inside a list item.
+
+To put a code block within a list item, the code block needs
+to be indented _twice_ -- 8 spaces or two tabs:
+
+- A list item with a code block:
+
+ <code goes here>
+
+### Code Blocks
+
+Pre-formatted code blocks are used for writing about programming or
+markup source code. Rather than forming normal paragraphs, the lines
+of a code block are interpreted literally. Markdown wraps a code block
+in both `<pre>` and `<code>` tags.
+
+To produce a code block in Markdown, simply indent every line of the
+block by at least 4 spaces or 1 tab.
+
+This is a normal paragraph:
+
+ This is a code block.
+
+Here is an example of AppleScript:
+
+ tell application "Foo"
+ beep
+ end tell
+
+A code block continues until it reaches a line that is not indented
+(or the end of the article).
+
+Within a code block, ampersands (`&`) and angle brackets (`<` and `>`)
+are automatically converted into HTML entities. This makes it very
+easy to include example HTML source code using Markdown -- just paste
+it and indent it, and Markdown will handle the hassle of encoding the
+ampersands and angle brackets. For example, this:
+
+ <div class="footer">
+ © 2004 Foo Corporation
+ </div>
+
+Regular Markdown syntax is not processed within code blocks. E.g.,
+asterisks are just literal asterisks within a code block. This means
+it's also easy to use Markdown to write about Markdown's own syntax.
+
+```
+tell application "Foo"
+ beep
+end tell
+```
+
+## Span Elements
+
+### Links
+
+Markdown supports two style of links: _inline_ and _reference_.
+
+In both styles, the link text is delimited by [square brackets].
+
+To create an inline link, use a set of regular parentheses immediately
+after the link text's closing square bracket. Inside the parentheses,
+put the URL where you want the link to point, along with an _optional_
+title for the link, surrounded in quotes. For example:
+
+This is [an example](http://example.com/) inline link.
+
+[This link](http://example.net/) has no title attribute.
+
+### Emphasis
+
+Markdown treats asterisks (`*`) and underscores (`_`) as indicators of
+emphasis. Text wrapped with one `*` or `_` will be wrapped with an
+HTML `<em>` tag; double `*`'s or `_`'s will be wrapped with an HTML
+`<strong>` tag. E.g., this input:
+
+_single asterisks_
+
+_single underscores_
+
+**double asterisks**
+
+**double underscores**
+
+### Code
+
+To indicate a span of code, wrap it with backtick quotes (`` ` ``).
+Unlike a pre-formatted code block, a code span indicates code within a
+normal paragraph. For example:
+
+Use the `printf()` function.