"
^\$cdt\[([a-zA-Z_][a-zA-Z0-9_]{3,100}),([a-zA-Z0-9_+\-*/%&|^!=<>\[\]$ ]{1,500}),([a-zA-Z0-9_+\-*/%&|^!=<>\[\]$ ]{1,500}),?([a-zA-Z0-9_\- ]{1,100}=[a-zA-Z0-9_+\-*/%&|^!=<>\[\]$ ]{1,500}(?:;[a-zA-Z0-9_\- ]{1,100}=[a-zA-Z0-9_+\-*/%&|^!=<>\[\]$ ]{1,500})*)?]$
"
gm