Drupal Wiki vs. XWiki vs. TiddlyWiki vs. TWiki vs. TracWiki

(Integrated in WYSIWYG-Editor with search in a dialog)
alternatively:
[[#123]]
[[#123][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)

WikiWord (CamelCase)
[[link]]
[[label|link]]

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

CamelCase
[wiki:ISO9000]
[wiki:TitleIndex Title Index]

(Integrated in WYSIWYG-Editor)
alternatively:
[[http://drupal-wiki.com]]
[[http://drupal-wiki.com][label]]

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

http://www.example.com
[[label|http://www.example.com]]

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

[http://www.edgewall.com/ Edgewall Software]

(Integrated into the  WYSIWYG-Editor)

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

! Level 1
!! Level 2
!!! Level 3
!!!! Level 4
!!!!! Level 5

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

= Level 1 =
== Level 2 ==
=== Level 3 ===
=== Explicit id === #using-explicit-id-in-heading

(Integrated into the WYSIWYG-Editor)

**bold**

''bold''

*bold*

'''bold'''

(Integrated into the  WYSIWYG-Editor)

//Italics//

//italic//

_italic_

''italic''

(Integrated into the  WYSIWYG-Editor)

__underline__

__underline__

<u>underline</u>

__underline__

(Integrated into the  WYSIWYG-Editor)

##monospace##

{{{monospaced}}}

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

{{{monospace}}}
`monospace`

(Integrated into the  WYSIWYG-Editor)

--Strike--

--strikethrough--

<strike>strikethrough</strike>

~~strike-through~~

(Integrated into the  WYSIWYG-Editor)

^^superscript^^

^^superscript^^

<sup>superscript</sup>

^superscript^

(Integrated into the  WYSIWYG-Editor)

,,subscript,,

~~subscript~~

<sub>subscript</sub>

,,subscript,,

(Integrated into the  WYSIWYG-Editor)

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

[img[local.jpg]]
[img[http://foo.bar/foo.jpg]]

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

[[Image(photo.jpg)]]                           # simplest
[[Image(photo.jpg, 120px)]]                    # with size
[[Image(photo.jpg, right)]]                    # aligned by keyword
[[Image(photo.jpg, nolink)]]                   # without link

(Integrated into the  WYSIWYG-Editor)

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

using custom classes, e.g.
{{right{
text
}}}

| left |   center   |   right |
or HTML
or CSS

(Integrated into the  WYSIWYG-Editor)

Non-semantic text indentation through styling:

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

Quotes:

> This is a quoted text

:indent

> quote

<<<
blockquote
<<<

<blockquote>
multi line text
</blockquote>

(Integrated into the  WYSIWYG-Editor)

* List
** list
*** list

* Item 1
** Item 1.1
* Item 2

* Item 1
* Item 1.1
* Item 2

* Item 1
* Item 1.1
* Item 1

(Integrated into the  WYSIWYG-Editor)

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

# Item 1
## Item 1.1
# Item 2

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

1. Item 1
1. Item 1.1
1. Item 1

(Integrated into the  WYSIWYG-Editor)

; term
: definition

; term
: description

$ Term: Definition

term::
definition

(Integrated into the  WYSIWYG-Editor)

----

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---

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