During the compilation process of a PL/I program, what does the term "Syntax analysis" refer to?

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Generating additional optional matricesIdentifying fundamental syntactic structures by means of reductionsDetecting basic tokens and forming standardized symbolsEmploying a macro processor to create more efficient assembly instructions

Explanation

Syntax analysis involves identifying the fundamental syntactic patterns within the source code by applying reduction techniques. This step ensures that the code conforms to the language's grammar rules, distinguishing it from lexical analysis (which handles token recognition) and macro processing (which optimizes code generation).