Language Processors
In analyzing the compilation of PL/I program, the term "Lexical analysis" is associated with

recognition of basic syntactic constructs through reductions
creation of more optional matrix
recognition of basic elements and creation of uniform symbols
use of macro processor to produce more optimal assembly code

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Language Processors
Assembler is

is a program that appears to execute a source program as if it were machine language
a program that automate the translation of assembly language into machine language
a program that places programs into memory and prepares them for execution
a program that accepts a program written in a high level language and produces an object program

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Language Processors
Terminal Table

a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure
a permanent table which lists all key words and special symbols of the language in symbolic form
contains all constants in the program
consists of a full or partial list of the tokens as they appear in the program. Created by Lexical analysis and used for syntax analysis and interpretation

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