NOAA/NWS interpretation of < effective> and <expires>

All,

The NWS interpretation of <effective> and <expires> as documented in the NWS CAP wiki

(https://wiki.citizen.apps.gov/nws_developers/index.php/Category:Common_Alerting_Protocol)

may not be consistent with the Australian profile.   We noticed there is no <onset> tag in the AU profile.  However, NWS is making every effort to differentiate between the effective time (<effective>) of the information in the alert message, the expected time of the beginning of the event (<onset>), the time at which the information in the message should no longer be used (<expires>), and the time at which the hazard conditions of the subject event are no longer expected (optional parameter we've added called <eventEndingTime> and wish to propose as standard for CAP v2.0).
Mike Gerber will be speaking more about this at the Wednesday meeting.Bob