Language Processors
Assembly code data base is associated with

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

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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
A base register table

is a term that refers to the control programs of an operating system
allows the programmer to write base registers and displacements explicitly in the source program
allows multiple programs to reside in separate areas of core at the same time
is used to remember which of the general-purpose registers are currently available as base registers, and what base addresses they contain

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