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internal links
[[London]] yields:  London
[[WP:Help|index of ''Help!'']] yields:  [WP:Help|index of Help!]]
• underscores & initial cap not required, but it's otherwise case-sensitive:
    [[dim sum]] yields the same as [[Dim_sum]] but not [[DIM_SUM]]
external links
[http://dr-bob.org] yields:  [1]
[http://dr-bob.org home <u>page</u>] yields:  home page
• soft spaces inside brackets don't show up except between words
• hard spaces inside brackets may cause words to vanish!
anchors
• link to any internal anchor-name using #, as in
   [[User:Flopzee#guidance]], which you should try now!—>   User:Flopzee#guidance
• header & subheader titles are automatically anchor-names
    Rabbits §§ 8.7.4 ("Fictional Ones" > "Potter" > "Imitators") could be
    [[Rabbits#Imitators|Flopzee]]
• html tags can have anchors inserted in them
    <div id="foo"> <br id="foo"> <meta id="foo">
    with links written [[Smoking#foo|health benefits]]
formatting links
• html tags (<u>, <sub>, <sup>, etc) only work in the "name" section inside brackets.
• Wiki ' works inside or  outside brackets.

other code

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code-as-content
<nowiki>  ...  </nowiki>
hide comments to other editors
<!--    ...    -->
forbid a Table of Contents on the page
__NOTOC__   ...or force it with __FORCETOC__
hard space
·ALT+0160
·does NOT survive cut-&-paste in the editing box
·apparently works        in strings
·width:  2 HS = 1 digit;  HS is wider than soft-space
bulleted outline or list
  • begin code with a star "*"
    • subcategories begin with 2 stars "**";  etc
indent text
• begin the line of code with a colon ":"
• 2 colons indent twice as far
• in the same line of code, a <br> keeps the next line of text indented in the same paragraph, BUT...
• anywhere after a ¶ in colon(:)-indented or star(*)-indented code, a <br> re-sets the following text to the left margin.
hanging subheads (like this whole section)
• begin the line of code with a semicolon ";"
• a new indented line of begins with return-colon "¶:" in the code
• subheaded bold automatically (no choice)

style

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"Clarity, content, and an NPOV are more important than format. Writers are not required to follow MoS rules."  –Wiki MoS (edited)

• citation styles

"It's more important to have clarity and consistency in an article's citations than to use this or that system." –cite guide (edited)
examples?

• Italic text followed normal text looks better in many fonts using hard space + space. Compare:

brick wall
brick  wall

content

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The distinction for Wiki is "verifiability, not truth." –WP:Verifiability

What is that screwy half-box up there?? I can't even find it in the html.

guidance

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The Perfect Article  •  Verifiability  •  Great Features  •  {{Templates Guide·List }}  •  Citation Styles  •  NPOV  •  Weaselese  •  Common Mitsakes  •  Categorizing  •  Help Index  •  Basic Code  •  Noteworthiness  •  Guideline Links