MediaWiki vs. Oddmuse vs. TWiki vs. XWiki

[[a link]]
[[a link|with title]]

optional, default on:
[[page name]]

optional, default off:
PageName
[PageName] → [1]
[[[page name]]] → [1]
[PageName text] → text
[[page name|text]] → text

Depending on plugins:
[text](page) → text

WikiWord autolink
Otherweb.WikiWord
[[Spaced text]]
[[WikiWord][label]]

XWiki supports 16+ input syntaxes (e.g. confluence, twiki, docbook, mediawiki, xwiki, markdown, etc), see http://rendering.xwiki.org/xwiki/bin/view/Main/WebHome#HSupportedSyntaxes for details.

The syntax documented below is XWiki Syntax 2.1 (http://platform.xwiki.org/xwiki/bin/view/Main/XWikiSyntax).

[[wiki syntax here>>Space.Page]]
[[Space.Page]]
(Space is optional and is the current space if not specified)

[http://example.org The title]

http://example.com/
[http://example.com/] → [1]

optional, default on:
[http://example.com/ text] → text

Depending on plugins:
[text](http://example.com/) → text

http://twiki.org/ autolink
[[http://twiki.org/][label]]

[[wiki syntax here>>http://www.xwiki.com]]
http://www.xwiki.com

==Section==
===Subsection===
====Sub-subsection====

Depending on plugins:
## two
### three
== two ==
=== three ==

section
=======

subsection
----------

---+ Level 1
---++ Level 2
---+++ Level 3
---++++ Level 4
---+++++ Level 5
---++++++ Level 6

= Headline
== Subheadline
=== Sub-subheadline
==== etc..

'''bold'''

Depending on plugins:
*bold*
**bold*
'''bold'''

*bold*

**bold**

''italic''

Depending on plugins:
*italic*
/italic/
//italic//
''italic''

_italic_

//Italics//

<u>underlined</u>

Depending on plugins:
_underline_
__underline__

<u>underline</u>

__underline__

<tt>monospace</tt>

Depending on plugins:
`mono`
##mono##
[code]mono[/code]
<tt>mono</tt>
<code>mono</code>

=monospaced text= and
<verbatim>
multi line text
</verbatim>

##monospace##

<s>strikethrough</s>

via bbCode plugin:
[s]strike through[/s]

<strike>strikethrough</strike>

--Strike--

<sup>superscript</sup>

via bbCode plugin:
[sup]superscript[/sup]

<sup>superscript</sup>

^^superscript^^

<sub>subscript</sub>

via bbCode plugin:
[sub]subscript[/sub]

<sub>subscript</sub>

,,subscript,,

[[Image:wiki.png]]

http://example.com/pic.jpg

Depending on plugins:
[[image:Name|Text|URL]] and variants
![text](URL)

%ATTACHURL%/image.png
http://any.domain/image.png

image:img.png
image:Space.Page@img.png
[[image:img.png||width="25" height="25"]]
image:http://some/url/img.png

Starting with the xwiki/2.1 syntax, also:
image:icon:cancel

<center>Centered</center>

no example known

| left |   center   |   right |
or HTML
or CSS

(% style="... css here..." %)Text

: indented line

Depending on plugins:
> text

[quote]
text
[/quote]

: one
:: two

<blockquote>
multi line text
</blockquote>

Non-semantic text indentation through styling:

(% style="... css here..." %)multi line text

Quotes:

> This is a quoted text

* Item 1
** Item 1.2
* Item 2

* one
** two

* Item 1
* Item 1.1
* Item 2

* List
** list
*** list

# Item 1
## Item 1.2
# Item 2

Depending on plugins:
1. one
2. two

# one
## two

1. Item 1
a. Item 1.a
1. Item 2

1. Item 1
11. Item 2
111. Item 3
1. Item 4

; term : definition

Depending on plugins:
; term: definition

$ Term: Definition

; term
: definition

----

Depending on plugins:
----

---

----