makefile(
   lib: ['eventdurs.ozf']
   uri: 'x-ozlib://gperciva/eventdurs'
   %% The feature mogul states an unique identifier for Mogul
   %% (http://www.mozart-oz.org/mogul/). This feature is required,
   %% even if you will not publish this extension on Mogul.
   mogul: 'mogul:/gperciva/eventdurs'
   %% The author of this extension. 
   author: 'Graham Percival'
   )