instant:
  summary: Time instant
  value: '2018-02-12T23:20:50Z'
now:
  summary: Current time
  value: 'now'
period:
  summary: Bounded interval
  value: '2018-02-12T00:00:00Z/2018-03-18T12:31:12Z'
period2:
  summary: Half-bounded interval
  value: '2018-02-12T00:00:00Z/..'
period3:
  summary: From date/time to now
  value: '2018-02-12T00:00:00Z/now'
period4:
  summary: From now to date/time
  value: 'now/2018-02-12T00:00:00Z'
period5:
  summary: Anything up to now
  value: '../now'
period6:
  summary: Anything from now on
  value: 'now/..'
latest:
  summary: Latest
  value: 'latest'