^start of line
ISAthe literal text ISA (case sensitive) \*the literal * (4210 / 528 / 2A16)
.*any character (except for line terminators), repeated any number of times
!GSthe literal text !GS (case sensitive) \*the literal * (4210 / 528 / 2A16)
.*any character (except for line terminators), repeated any number of times
!STthe literal text !ST (case sensitive) \*the literal * (4210 / 528 / 2A16)
.*any character (except for line terminators), repeated any number of times
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string