A global level script node defines a global module package. The package is available to all scripts as a global table
with a name equal to the name attribute in the definition.
The script contents can be specified either directly, as the contents of the element, or indirectly in an external
source file defined using the file attribute.
If present, this function is executed when the package is destroyed. This happens when the application
is closed, before the database or user interface are destroyed.
If present, this function is executed when the package is evaluated. This happens when the application
is started, after the user interface has been constructed but before any user interaction.
