Time Transparency

Basic Definition | Description| | Example

Basic Definition

Property Name
This property defines whether an event is transparent or not to busy time searches.
Value Type
Property Parameters
Non-standard property parameters can be specified on this property.
This property can be specified once in a "VEVENT" calendar component.


Time Transparency is the characteristic of an event that determines whether it appears to consume time on a calendar. Events that consume actual time for the individual or resource associated with the calendar SHOULD be recorded as OPAQUE, allowing them to be detected by free-busy time searches. Other events, which do not take up the individual's (or resource's) time SHOULD be recorded as TRANSPARENT, making them invisible to free-busy time searches.

Format Definition

The property is specified by the following

  transp     = "TRANSP" tranparam ":" transvalue CRLF

  tranparam  = *(";" xparam)

  transvalue = "OPAQUE"      ;Blocks or opaque on busy time searches.
             / "TRANSPARENT" ;Transparent on busy time searches.
     ;Default value is OPAQUE


The following is an example of this property for an event
that is transparent or does not block on free/busy time searches:


The following is an example of this property for an event that is
opaque or blocks on free/busy time searches: