Duration
From Semantic MediaWiki Community Wiki
Extension:
Description:
Adding to the DateTime request it would also be nice with a type for durations.
Example: At Säsongsmat.nu we currently use durations for two things: Cooking time in recipes (now entered as strings, and converted to ISO style durations by an own extension that need the duration info to add semantic microdata à la HTML5), and periods of the year when a certain produce is in seasong (currently expressed as a number of events, 0-366, one for each day in season, during the randomly choosen year 1912).
Might be possible when we start getting some funding ourselves
