The basic idea of markdown is a “counterpart” of markup languages:
+ Markup languagues : using extra XML (for example HTML) -> text content
+ Markdown languages: using text -> content with format (HTML)
Basically, it’s like a syntax language to generate text -> HTML . So, if you have used some HTML Editor with text syntax (like when you using some Wiki editor to write – Confluence, Dokuwiki, Redmine, Trac, …) , you already use some markdown language.
Markdown syntax, is a specific one, and it has been adopted widely (especially on GitHub), not depending on a single wiki product. Now it’s more popular and has some implementations/variants which can be embedded in applications easily.
https://ducquoc.files.wordpress.com/2012/06/markdown_example_ducquoc.png
Some basic syntax of official Markdown (extensions .md, .markdown, .MD) :
Headers
# This is an
tag
## This is an
tag
###### This is an
tag
(nghĩa là tương ứng HTML h1 -> h7 , tùy theo số lượng # ở đầu, riêng H1 còn có thể dùng dạng 1 dòng ở dưới nhiều dấu = sát nhau, VD: https://github.com/ducquoc/euler-fun/blob/master/README.md raw )
.
Emphasis
*This text will be italic*
_This will also be italic_
**This text will be bold**
__This will also be bold__
_You **can** combine them_
Lists
Unordered
* Item 1
* Item 2
* Item 2a
* Item 2b
Ordered
1. Item 1
1. Item 2
1. Item 3
1. Item 3a
1. Item 3b
Images
Format: 
Links
[Alt text](URL)
[Duc Quoc blog](https://ducquoc.wordpress.com)
Blockquotes
As Kanye West said:
> We're living the future so
> the present is our past.
or
As Kanye West said:
```
We're living the future so
the present is our past.
```Inline code
I think you should use an
`` element here instead.(nghĩa là giữa 1 cặp backtick ` )
.
https://ducquoc.files.wordpress.com/2012/06/markdown_example_ducquoc.png
.
See also:
http://www.markitdown.net/markdown
https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet
https://guides.github.com/features/mastering-markdown/
https://bitbucket.org/tutorials/markdowndemo
https://markdown-it.github.io/
https://blogs.uoregon.edu/rclub/2016/04/26/r-markdown-resources/
.
UPDATE 2017
Đã có những định dạng “reversed markup” khác cạnh tranh với MarkDown:
+ ReStructuredText //docutils.sourceforge.net/rst.html (thường .rst http://rst.ninjs.org/ )
+ AsciiDoc //asciidoc.org/ (thường .adoc https://asciidoclive.com/edit/scratch/1 )
Ngoài ra, Textile (https://txstyle.org/ ) – được xem là tiên phong truyền cảm hứng cho Markdown – cũng còn được sử dụng khá nhiều, nổi bật là các sản phẩm JIRA, Redmine, Jekyll, BaseCamp classic, …
./.
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