You can modify the calculation
instructions for derived attributes.
About this task
To edit the calculation instructions for derived attributes:
What to do next
The calculation instructions
that you edit appear in the main.jet file the next time that you run
the Update Project command.
Note: If a derived attribute calculation
is more complex, or requires values calculated by other JET tags,
you can also edit the main.jet file directly. In the Project
Explorer view, double-click the main.jet file.