All PIs may have a limited lifespan. You can specify the first and last date for the PI to be used. This is controlled by two parameters that are not documented for each PI.

Optional parameters for all PIs

firstdate	The first day this PI will be used in a build process.
lastdate	The last day this PI will be used in a build process

The form of the attributes are: yyyy:mm:dd. You may use one, both or none. If neither is present, the element is valid at all times.

Examples:

  <?_wxt importtext location="mygreetings.txt" firstdate="2010:04:01"?>