Title: Recurring Events

Author: Martin Fowler

100031.3311@compuserve.com

88 Worcester St, #3

Boston, MA 02118

(617) 859 0464

Abstract

Recurring events often need to be supported in software. A doctor's
schedule may include the fact that he does a gastro clinic on the
first and third Mondays of the month, and teaches a class every
Wednesday during the summer months. This pattern language suggests a
structure for handling this situation, allowing an object to have
several recurring events scheduled in different ways. The temporal
expressions use subtyping and set composition to allow simple
expression to be handled simply, yet providing flexibility for more
difficult situations.