History: Category

            ! {icon name="sitemap" rotate="270"} Categories
{DIV(class="row")}{DIV(class="col-sm-9")}{DIV(class="lead")}A category is a means of classifying the pages and other objects of a Tiki website, including blogs, articles, polls, forums, wiki pages, file galleries and trackers. The feature is similar to, but different from ((tags)) and ((structures)). Any Tiki ((object)) including wiki pages, ((blog)) posts, ((Forums|forum)) topics, ((calendar)), or ((tracker)) can be added to one or many categories for content organization and/or object access purposes. {DIV}
;__To access__: Click the __Categories__ icon {icon name="sitemap" rotate="270" size="2" title="Image may vary depending on the icon set in use."} on the ((Admin Panels|Admin Panel)) %%% or %%% Access __http://example.org/tiki-admin.php?page=category__{DIV} 
{DIV(class="col-sm-3")}^::Related Topics::
*((Category User))
*((PluginCategory))^{DIV}{DIV}
{PREFDOC(tab="category")/}

!! General description
Categories are often used to control access to different sets of content. Setting ((permissions)) for a category will __override__ ((global permissions)) for objects in that category. 

^Example: A "public" category for anonymous users.
If the global permissions in Tiki are set such that ((anonymous)) users cannot see wiki pages, then you can define a category called ''public'', which does allow the ((group)) anonymous users to view the content. Then by adding a wiki page to category ''public'' - this page will now be visible without logging in.^   

Categories can also be used to aid navigation or create a ((taxonomy)) of objects. Categories are a tool that persists for all features, not just for wiki or articles or trackers. Depending on the settings, category listings can be displayed in a side module, above or below the content. ((Menus)), ((modules)) and ((structures)) are also used for navigation, and categories for access control. Articles also use ((topics)) for classification.  

!!! Key Functioning and sub-features
* Organize categories in a tree hierarchy with unlimited subcategories.
* Assign objects to one or many categories
* Administrators can apply different permissions to different categories. 
* Administrators can apply different themes to different categories. 
* Deep search into subcategories from the [tiki-browse_categories.php|category browser]
* On wiki pages, you can show the category path and/or show objects in the same category(ies)
* Manage ((Category Transitions))



!! Category Permissions

The way that category permissions work has changed substantially over time. 

Up to version 1.9.11, a user with edit permission for a type of object is allowed to edit any object which they can view.  In version 2.0 the ''[http://tikiwiki.org/ReleaseNotes20#Category_Permissions|tiki_p_edit_categorized]'' permission allows editing of objects with the user's categories.  See also ''((Categories Details))''.

Starting in ((Tiki4)), all permissions can be added to categories, and ((Category Transitions)) are introduced.

By changing the theme from one category to the next it is possible to create visually distinct "zones" in a Tiki site. 


Related Plugins
* ((PluginCategory)) - creates a table of contents using categories.
* ((PluginCatPath)) - creates a "breadcrumbs" trail
* ((PluginCatorphans)) - displays uncategorized pages.

Related Modules
* ((Module change_category)) Powerful display and modifications of the category of the current object.
* ((Module categories)) Displays category tree.


-=Related Links=-
* ((Category User)) - explains how to navigate and search categories
* ((Category Admin)) - how to set up categories, and apply themes and permissions
* ((Categories Details)) - plugins, tweaks and other technical details.

-=Alias=-
* (alias(Categories))
* (alias(Category Tree))
* (alias(Facet))
* (alias(Facets))
* (alias(Faceted classification))
* (alias(Categories Admin))


Related external links
http://en.wikipedia.org/wiki/Faceted_classification