What type of languages does Context-Sensitive Grammar focus on?

Context-sensitive grammar focuses specifically on context-sensitive languages, which are a subset of formal languages recognized in the Chomsky hierarchy. These languages are defined by grammars whose production rules have the form where the length of the string produced can change depending on the context of the symbols present. In other words, a context-sensitive grammar can generate strings that require rules to change or adapt based on surrounding symbols, thus allowing for more complexity than context-free languages, which are restricted by more simple production rules.

This distinction is important in the study of formal language theory, as it illustrates the capabilities and limitations of different types of grammars and the languages they can generate. Understanding context-sensitive languages allows educators and linguists to better analyze complex syntactic structures that may be present in natural languages, particularly in terms of how context can influence meaning and grammatical correctness.