The IMPORT tag is used to call a FUNCTION or to
import an external HTML file or SteelArrow script.
Imported SteelArrow scripts have access to all variables defined before
the IMPORT call, and may also receive data passed using the
PARAM tag. As well, if INCLUDE="yes" is specified any variables defined
within the imported page will be included in the callers namespace.
For security reasons IMPORT only supports the import of HTML or
SteelArrow scripts, and does not support absolute file paths.
Note: IMPORT supports "virtual" paths. These paths can be configured
by the system administrator.