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Freedesktop.org Notifications specification

For the most part, xfce4-notifyd is compliant with the fd.o notifications specification. However there are also some features which it lacks, e.g. sound. Another example is “urgency”, which is only implicitly supported by checking the expire-timeout. The following table provides an overview.

Please note that the "default action", which is usually triggered by clicking a notification bubble is not implemented in xfce4-notifyd. Clicking a notification instead closes it. If applications want to provide actions they have to specify the tuple of action-id and action for a button to be shown in the bubble.
Hint Value Type Description Spec Version Supported by notifyd
“action-icons”booleanWhen set, a server that has the “action-icons” capability will attempt to interpret any action identifier as a named icon. The localized display name will be used to annotate the icon for accessibility purposes. The icon name should be compliant with the Freedesktop.org Icon Naming Specification. >= 1.2 No
“category”stringThe type of notification this is.   No
“desktop-entry” stringThis specifies the name of the desktop filename representing the calling program. This should be the same as the prefix used for the application's .desktop file. An example would be “rhythmbox” from “rhythmbox.desktop”. This can be used by the daemon to retrieve the correct icon for the application, for logging purposes, etc. Yes
“image-data”(iiibiiay)This is a raw data image format which describes the width, height, rowstride, has alpha, bits per sample, channels and image data respectively. >= 1.2 Yes
“image_data”(iiibiiay)Deprecated. Use image-data instead. 1.1 Yes
“image-path”stringAlternative way to define the notification image. See Icons and Images. >= 1.2 Yes
“image_path”stringDeprecated. Use image-path instead. 1.1 Yes
“icon_data”(iiibiiay)Deprecated. Use image-data instead. < 1.1 Yes
“resident”booleanWhen set the server will not automatically remove the notification when an action has been invoked. The notification will remain resident in the server until it is explicitly removed by the user or by the sender. This hint is likely only useful when the server has the “persistence” capability. >= 1.2 No
“sound-file”stringThe path to a sound file to play when the notification pops up.   No
“sound-name”stringA themeable named sound from the freedesktop.org sound naming specification to play when the notification pops up. Similar to icon-name, only for sounds. An example would be “message-new-instant”.   No
“suppress-sound”booleanCauses the server to suppress playing any sounds, if it has that ability. This is usually set when the client itself is going to play its own sound.   No
“transient”booleanWhen set the server will treat the notification as transient and by-pass the server's persistence capability, if it should exist. >= 1.2 Yes
“x”intSpecifies the X location on the screen that the notification should point to. The “y” hint must also be specified.   No
“y”intSpecifies the Y location on the screen that the notification should point to. The “x” hint must also be specified.   No
“urgency” byte The urgency level. No

Other Notifications specifications