Exporting System.properites values

[Spencer Marks]

Hi,

I was wondering if there's a way to get Ant to set properties that would 
then be available when a taskdef runs.

For example, before running JUnit tests, I'd like to pass a system 
property specifying where test data is located. Then the JUnit test 
would know where to access installation specific data.

Perhaps this is not the not best way to solve the problem. If not, I'd 
like to hear how people solve similar problems.

Thanks, Spencer