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An input file for Tefigel consists of a sequence of <logical-line>'s.
Commands and instructions steer the file generation process
performed by Tefigel on its input(s) to generate its
output(s).
<command-marker> <instruction> <instruction-parameters>
<command-marker> <subprogram-reference>
<command-marker> <subprogram-reference>(<parameter-list>)
<instruction-marker> <instruction-parameters>
A <logical-line> consists of one or more physical lines of text; if the
last character of a physical line matches the current
linebreak <special-function> then
the logical line continues on the next physical line.
A Tefigel <command> is a logical text line beginning
with one of the following:
A Tefigel <instruction> is a Tefigel keyword in lower case (default)
or upper case,
depending on the current value of <control-variable> CMD_CASE.
The <instruction-marker> and <command-marker>, collectively
referred to as <marker>'s,
are characters associated respectively with one specific
instruction or with all instructions, and appearing as the first
character in an input line. White spaces (blank or tab)
appearing on a command line between the <command-marker>
and the instruction are ignored.
Within <tefigel-section>'s the
<command-marker> may be omitted and leading white spaces (blank or tab)
are ignored.
Depending on the <instruction>, a list of <instruction-parameters>
may follow the Tefigel keyword.
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