FYI: Interval Vocabulary

Just wanted to make folks aware of this..

  http://ns.jasnell.me/interval

It's a small vocabulary for representing bounded intervals (totally
ordered sets). It is born out of various Activity Streams use case
including the ability to indicate validity date ranges for certain
types of objects, identifying filter ranges for Collection items and
other wonderful things.

It ought to be fairly straightforward. Would eventually be interested
in seeing this become a WG Note but definitely not a priority.

- James