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| == Freedesktop.org and Standard Directories ==
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| Many of the free and open source software projects that focus on desktop technology collaborate on shared specifications and software within the [http://freedesktop.org freedesktop.org] project.
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| One of these shared specifications is the [http://standards.freedesktop.org/basedir-spec/latest/ base directory specification] which defines a set of locations in the filesystem that can be used for portable desktop technology implementations.
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| KDE supports the base directory specification and the various [[../Environment_Variables|environment variables]] it proscribes in addition to the [[../KDE_Filesystem_Hierarchy KDE|filesystem hierarchy]]. A summary of KDE's implementation follows below, while the full specification can be read [[http://standards.freedesktop.org/basedir-spec/latest/ here on freedesktop.org]].
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| == Application Data ==
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| Data that applications store which are specific to a given user are to be stored in the <tt>XDG_DATA_HOME</tt> directory. If the <tt>XDG_DATA_HOME</tt> environment variable isn't set, it defaults to {{path|$HOME/.local/share}} for local storage and {{path|/usr/local/share;/usr/share}} for system wide files.
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| Some items that may be stored in <tt>XDG_DATA_HOME</tt> are files the user has put in the trash, mimetype definitions and associations and application .desktop files.
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| The search path for system wide directories can be defined setting the <tt>XDG_DATA_DIRS</tt> environment variable to contain a list of paths.
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| == Configuration ==
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| Configuration information should be stored in the <tt>XDG_CONFIG_HOME</tt> directory. If the <tt>XDG_CONFIG_HOME</tt> environment variable isn't set, it defaults to {{path|$HOME/.config}} for local storage and {{path|/etc/xdg}} for system wide files.
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| Some items that may be stored in <tt>XDG_CONFIG_HOME</tt> are application configuration files and application menu structure.
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| The search path for system wide directories can be defined setting the <tt>XDG_CONFIG_DIRS</tt> environment variable to contain a list of paths.
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| == Cache Files ==
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| Temporary data caches can be stored in the <tt>XDG_CACHE_HOME</tt> location, which defaults to {{path|$HOME/.cache}}. There is no system wide cache location as such caches are always user specific.
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| == Thumbnails ==
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| Thumbnails representing the contents of files for use in icons and other representations of files are to be stored in {{path|$HOME/.thumbnails}}. The structure and content of the thumbnails directory is defined in the [http://jens.triq.net/thumbnail-spec/index.html thumbnail specification].
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