Index to all '''Category pages''' on this Wiki.

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To see an alphabetically sorted index of all Category pages on this Wiki, click on the above title.

A Category is a page that is used to collect a group of related pages;
see the http://emacswiki.org/ for a good example of how to use categories.

To create a category, create a new page called "Category {topic}", 
where {topic} is the topic of the category; 
the page should link to this page, [Category Category].

It would also be appreciated if you would add an entry at [How do Wiki Categories work] 
describing what kinds of things should be tagged with your category.

For example, the category of ''personal Wiki home pages'' is called [Category Home Page].
To add a person's Wiki home page to the category, place a link to [[Category Home Page]] 
on his home page. 

By convention, category links are put at the bottom of the page, as shown below.
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When there are multiple categories that apply to a page, 
I feel that it helps to put the categories in order (I prefer alphabetical order). 

I was realizing the category system anticipated the ''tagging'' [http://en.wikipedia.org/wiki/Tagging]
or ''social bookmarking'' [http://en.wikipedia.org/wiki/Social_bookmarking] of the web. -- ''[escargo]''

[DKF]: A nice convention is to do something like this:

'''[[[[[[Category''' ''foo''''']]|[[Category''' ''bar''''']]]]]]'''

[Lars H]: Most [wikignomes] around here seem (according to four months' observations of practices) to prefer a less cramped style than that which DKF shows above, in that they put spaces around the category links. Taking advantage of the fact that [Wikit] joins lines up into paragraphs, this can be coded with one category per line as follows:
 [[
 [Category Foo] |
 [Category Bar] |
 [Category Fu Bar] |
 [Category Baz]
 ]]
for
[[
'''Category Foo''' |
'''Category Bar''' |
'''Category Fu Bar''' |
'''Category Baz'''
]]

[HJG] 2007-05-10 : I suggest using a dash "-" instead of "pipe "|" as a separator.
Because pipe-chars are so narrow, they don't serve their purpose as visible separators between items.
It makes all the category-links appear as a continous stream of characters, and you have to look
carefully where each link starts.
I.e. pipes make the category-links a lot less legible than dashes.

For example, look at the categories at the bottom of [An equation solver].

Also, I think the outer brackets around the whole line of links is not necessary, 
so I prefer a simple
 [Category Bar] - [Category Grill] - [Category Beer]
for
'''Category Bar''' - '''Category Grill''' - '''Category Beer'''

[EMJ] 10 May 2007 - The pipes are OK if they are surrounded by spaces - just like your dashes!

[DKF]: Ugh, I hate that style! :-) What would be better is if (properly) formatted Category lines were treated specially by the rendering engine; that would be really cool...

[jdc] 24-oct-2007 A new style to specify categories, as introduced by [dkf] is using a centered table:

 !!!!!!
 |[Category Example]|[Category Debugging]|[Category Science]|
 !!!!!!

Which will look like this:

!!!!!!
|[Category Example]|[Category Debugging]|[Category Science]|
!!!!!!

[AK]: Nicer highlighting would, IMVHO:

  !!!!!!
  %|[Category Example]|[Category Debugging]|[Category Science]|%
  !!!!!!

rendered as:

!!!!!!
%|[Category Example]|[Category Debugging]|[Category Science]|%
!!!!!!

The '%|' and '|%' marker cause it to be rendered like a table header, and I like the highlighting this achieves better, more contrast to the general background of text on the page.

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[[[Category Category]]]