Oddmuse vs. XWiki vs. PhpWiki

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

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)

WikiWord or [somelink]
[ desc | pagename ]

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

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

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

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

http://someserver/someurl
[ desc | exturl ]

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

section
=======

subsection
----------

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

!!!Headline1
!!Headline2
!Headline3

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

**bold**

*bold* or
<strong>bold</strong>

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

//Italics//

_italics_ or 
or
<em>italics</em>

Depending on plugins:
_underline_
__underline__

__underline__

<u>underlined</u>

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

##monospace##

<tt>monospace</tt>
<code>code</code>
<pre>preformatted</pre>
<verbatim>
unparsed text</verbatim>

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

--Strike--

<strike>striked through</strike>

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

^^superscript^^

<sup>above</sup>

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

,,subscript,,

<sub>below</sub>

http://example.com/pic.jpg

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

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

[ http://foo.org/1.jpg size=30%] 
external image
[Upload:view.jpg align=right size=50x40] 
view uploaded image
[Upload:view.jpg | http://server/external-linkjpg ] 
view and link to another image

no example known

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

<?plugin RawHtml <span align="right"> ?>right<?plugin RawHtml </span> ?>
or <div align="right"> right </div>

Depending on plugins:
> text

[quote]
text
[/quote]

: one
:: two

Non-semantic text indentation through styling:

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

Quotes:

> This is a quoted text

;: left indent
;;: more left indent

or 
paragraph
and another level 

* one
** two

* List
** list
*** list

* list
or
- list

Depending on plugins:
1. one
2. two

# one
## two

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

# list

Depending on plugins:
; term: definition

; term
: definition

Term:<def>
def

Depending on plugins:
----

----

----