namespace gCal = "http://schemas.google.com/gCal/2005"

start =
  calendar_icalUIDProperty
  | calendar_privateCopyProperty
  | calendar_quickAddProperty
  | calendar_resourceProperty
  | calendar_sendEventNotificationsProperty
  | calendar_sequenceNumberProperty
  | calendar_syncEventProperty
  | calendar_timeZoneProperty
  | calendar_timesCleanedProperty
  | calendar_webContent
  | calendar_webContentGadgetPref

calendar_icalUIDProperty = element gCal:uid { attribute value { xsd:string } }
calendar_privateCopyProperty = element gCal:privateCopy {
    attribute value { xsd:boolean } }
calendar_quickAddProperty = element gCal:quickadd {
    attribute value { xsd:boolean } }
calendar_resourceProperty = element gCal:resource {
    attribute id { xsd:string }?,
    attribute value { xsd:boolean }? }
calendar_sendEventNotificationsProperty = element gCal:sendEventNotifications {
    attribute value { xsd:boolean } }
calendar_sequenceNumberProperty = element gCal:sequence {
    attribute value { xsd:int } }
calendar_syncEventProperty = element gCal:syncEvent {
    attribute value { xsd:boolean } }
calendar_timeZoneProperty = element gCal:timezone {
    attribute value { xsd:string } }
calendar_timesCleanedProperty = element gCal:timesCleaned {
    attribute value { xsd:unsignedInt } }
calendar_webContent = element gCal:webContent {
    attribute height { xsd:int },
    attribute url { xsd:string },
    attribute width { xsd:int },
    calendar_webContentGadgetPref* }
calendar_webContentGadgetPref = element gCal:webContentGadgetPref {
    attribute name { xsd:string },
    attribute value { xsd:string } }