Parameter Name:  DISPLAY

Purpose:  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

Description:  This property parameter MAY be specified on "IMAGE"
properties.  In the absence of this parameter, the value "BADGE"
MUST be used for the default behavior.  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 8.3.  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.

Example:

IMAGE;VALUE=URI;DISPLAY=BADGE,THUMBNAIL,;FMTTYPE=image/png:http://exa
mple.com/images/weather-cloudy.png