The list of default Contexts for the icon theme are:

Table 1. Standard Contexts

Actions Icons which are generally used in menus and dialogs for interacting with the user. actions
Animations Animated images used to represent loading web sites, or other background processing which may be less suited to more verbose progress reporting in the user interface. Animations should be a PNG with frames which are the size of the directory the animation is in, tiled in a WxH grid. Implementations should determine the number of frames by dividing the image into its frames, and iterating from left to right, wrapping to the first frame, after rendering the last. animations
Applications Icons that describe what an application is, for use in the Programs menu, window decorations, and the task list. These may or may not be generic depending on the application and its purpose. Applications which are to be considered part of the base desktop, such as the calculator or terminal, should use the generic icons specified in this specification, while more advanced applications such as web browsers and office applications should use branded icons which still give the user an idea of what function the application provides. apps
Categories Icons that are used for categories in the Programs menu, or the Control Center, for separating applications, preferences, and settings for display to the user. categories
Devices Icons for hardware that is contained within or connected to the computing device. Naming for extended devices in this group, is of the form <primary function>-<manufacturer>-<model>. This allows ease of fallback to the primary function device name, or ones more targeted for a specific series of models from a manufacturer. For example, a theme author may want to provide icons for different phones. The specific model icons could be named phone-samsung-t809, phone-motorola-rokr, and phone-motorola-pebl. However, the theme must provide a phone icon in the theme's style, so that devices not matching these models, will still have an appropriate icon. An exception to this rule is that the media icons do not need to include manufacturer names, as they are generic items, and may be available from many manufacturers. As a result, for media, the specific icons are to differentiate between different specific types of media. For exmaple, an artist may wish to provide icons for BluRay, DVD, HD-DVD, CD-ROM, and variations thereof. The specific media type icons should be named in the form, <primary function>-<specific format>. Some examples are media-optical, media-optical-bd and media-optical-dvd. devices
Emblems Icons for tags and properties of files, that are displayed in the file manager. This context contains emblems for such things as read-only or photos. emblems
Emotes Icons for emotions that are expressed through text chat applications such as :-) or :-P in IRC or instant messengers. emotes
International Icons for international denominations such as flags. intl
MimeTypes Icons for different types of data, such as audio or image files. mimetypes
Places Icons used to represent locations, either on the local filesystem, or through remote connections. Folders, trash, and workgroups are some examples. places
Status Icons for presenting status to the user. This context contains icons for warning and error dialogs, as well as for the current weather, appointment alarms, and battery status. status