Significant or Premiere Event types ?

In the Performing Arts world, you deal a lot with Premiere's and various
types of them.
But in Schema.org there's no nice type that helps designate a Premiere
Event from any other Event.

Wikidata just recognized this with a new 'premiere type' property
<https://www.wikidata.org/wiki/Wikidata:Property_proposal/premiere_type> -
read the use cases within the discussion.  They also have SignificantEvent
<https://www.wikidata.org/wiki/Property:P793> that also helps a lot.

It seems we have http://schema.org/releasedEvent on any CreativeWork type
that sort of helps, but not on the Event type level itself.  So you have to
walk around the graph more than necessary to discover Significant or
Premiere events.

Also, I am wondering given the releasedEvent description, if it really is
for the use case of ..*the first public performance* ?

I think it would be wise to have a PremiereEvent (or SignificantEvent) type
that can be instead the expected type on the releasedEvent property.  In
the Performing Arts world there is usually a sub type or further
sub-categorization of a Premiere such as world premiere, language premiere,
new staging, etc.

Thoughts ?
-Thad
+ThadGuidry <https://plus.google.com/+ThadGuidry>