! means is not

: represents a new line for example:

If [F]FIELD = 'BLANK' : INFBOX 'HELLO' : Endif   

which is equivalent to the following:

If [F]FIELD = 'BLANK' 

INFBOX 'HELLO' 

Endif   

Thanks Chris. Any thoughts or resources I can use to learn more? I've been trolling the Script glossary in the X3 Online Help center but it only goes so far

Unfortunately, there is like no resource to learn the material really. Its more of a learn as you go process. 

Unfortunately, there is like no resource to learn the material really. Its more of a learn as you go process.