Deadline found...but no, Schema.org search is lying

So, I tried 'Deadline' in our Schema.org search and it brought up the Event
class.  Great !

Search for 'deadline' inside Event class....nothing.
Search in git repository for 'deadline' ... nothing.

LIAR ! Google Custom Search ! :)
Anyways...

Looking for something like this:
http://vocab.deri.ie/c4n#Deadline

An Event with a condition that has a deadline.
"to describe calls, such as call for tenders, call for proposals, call for
papers, etc."

Anyone know ?

Is this also the same way as saying...

https://schema.org/Demand  - validThrough ?

If so, can we get an alias of 'deadline' on validThrough please ?

Thanks in advance for any help on this one.  Friend owed from 12 years ago
just called in out of the blue for this one :)

Thad
+ThadGuidry <https://www.google.com/+ThadGuidry>