To specify different ways in which an image for a calendar or component can be displayed.
Format Definition: This property parameter is defined by the following notation:
displayparam = "DISPLAY" "=" displayval *("," displayval)
displayval = ("BADGE" / ; image inline with the title of the ; event "GRAPHIC" / ; a full image replacement for the event ; itself "FULLSIZE" / ; an image that is used to enhance the ; event "THUMBNAIL" / ; a smaller variant of "FULLSIZE" to be ; used when space for the image is ; constrained x-name / ; Experimental type iana-token) ; Other IANA-registered type ; ; Default is BADGE
This property parameter MAY be specified on "IMAGE" properties. In the absence of this parameter, the default value "BADGE" MUST be used. The value determines how a client ought to present an image supplied in iCalendar data to the user.
Values for this parameter are registered with IANA as per Section 9.3.1. New values can be added to this registry following the procedure outlined in Section 8.2.1 of [RFC5545].
Servers and clients MUST handle x-name and iana-token values they don't recognize by not displaying any image at all.