This property defines a Uniform Resource Locator (URL) associated with the iCalendar object.
IANA and non-standard property parameters can be specified on this property.
This property can be specified once in the "VEVENT", "VTODO", "VJOURNAL", or "VFREEBUSY" calendar components.
This property may be used in a calendar component to convey a location where a more dynamic rendition of the calendar information associated with the calendar component can be found. This memo does not attempt to standardize the form of the URI, nor the format of the resource pointed to by the property value. If the URL property and Content-Location MIME header are both specified, they MUST point to the same resource.
This property is defined by the following notation:
url = "URL" urlparam ":" uri CRLF
urlparam = *(";" other-param)
The following is an example of this property