'participant_cancelled' => ts('Events - Registration Cancellation Notice', array('escape' => 'sql')),
'participant_confirm' => ts('Events - Registration Confirmation Invite', array('escape' => 'sql')),
'participant_expired' => ts('Events - Pending Registration Expiration Notice', array('escape' => 'sql')),
'participant_cancelled' => ts('Events - Registration Cancellation Notice', array('escape' => 'sql')),
'participant_confirm' => ts('Events - Registration Confirmation Invite', array('escape' => 'sql')),
'participant_expired' => ts('Events - Pending Registration Expiration Notice', array('escape' => 'sql')),