Issue with rich snippets tools testing tool & userComments

Hello,

This issue already occured with BusinessEvent

When I describe a userComments, as it is an Event, I have to add a
"startDate" itemprop
  <meta
  itemprop="startDate"
  content="2012-02-29T07:33Z"/>

if we want to avoid a RichSnippet Testing Tools error :  Warning: Missing
required field "dtstart".

userComments would be a lot more comfortable with other creativeWorks

Jean

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