title: Does the ICS file format allow for updating and deleting events?
body: <p>We have developed a calendar for our extranet. Each week we update it with next week's courses schedule for all teachers and students of the school. This also triggers the sending per email of ICS files to those users who chose that option.</p>
  
  <p>Now, it almost always happens that there are last minute changes, so a need to do a new schedule update, hence a resend of the updated ICS. </p>
  
  <p>Question: for the moment the user has to manually delete the events already imported into its calendar application. Is there a way for us to add some DELETE or UPDATE events into the user's calendar? Does the ICS format allows that?</p>