The values in symbols can be blank or null.

|Import|
|fitnesse.slim.test|

|null fixture|
|get null?   |
|$NULL=                       |
|null|

|null fixture|$NULL|

|script|test slim|
|check|echo string|$NULL|null|


|null fixture|
|get blank?   |
|$BLANK=                       |


|null fixture|$BLANK|

|script|test slim|
|check|echo string|$BLANK||