## Example usage
1:
```
EXPORT BEGIN-MODULE T1

: hi ." hi" ;

END-MODULE

IMPORT T1

hi

END-IMPORT
```
2:
```
BEGIN-MODULE T1

: (hi) ." hi" ;

EXPORT : hi (hi) ;

END-MODULE

IMPORT T1

hi

END-IMPORT
```
3:
```
EXPORT BEGIN-MODULE T1

: hi ." hi" ;

END-MODULE

BEGIN-MODULE T2

EXPORT IMPORT T1

END-MODULE

IMPORT T2

hi

END-IMPORT
```