What Is A Difference Between Context-free Grammar And Context Sensitive Grammar?

What Is A Difference Between Context-free Grammar And Context Sensitive Grammar? Context-sensitive grammars are more general than context-free grammars, in the sense that there are languages that can be described by CSG but not by context-free grammars. Context-sensitive grammars are less general (in the same sense) than unrestricted grammars. What is the difference of context