collection

5.1.3. VTODO

  • The three properties are DTSTART, DUE, DURATION.

  • DTSTART MAY appear once.

  • Either DUE or DURATION MAY appear in a VTODO, but DUE and DURATION MUST NOT occur in the same VTODO.

  • If DURATION does appear in a VTODO, then DTSTART MUST also appear in the same VTODO.

  • The three properties for a VTODO are related in the same way as for VEVENT. Additionally a VTODO calendar component without the DTSTART and DUE (or DURATION) properties specifies a VTODO that will be associated with each successive calendar date, until it is completed.