The <customactivitytypes> element configures custom authoring tools for custom activities in the Syllabus or ItemEditor components.
<customactivitytype id="string" name="string" editurl="string" [icon="string"]/>
customactivitytypes / customactivitytypeid ID of the custom activity type. This string should be unique and not collide with existing or built-in activity types. To avoid collissions, you may want to prefix these IDs with your domain login prefix.

nameName of the custom activity type that will be displayed in the "Add" menu.

editurl Specifies the URL to author the custom activity. See Custom Activity UI for more information.

iconRelative URL to the 16x16 image that will be displayed for the custom activity type in the "Add" menu of the Syllabus component.
See Also
Domain Customization Custom Activity UI