pTAL Conversion Guide

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pTAL Conversion Guide—527302-002
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Syntax Diagram Conventions
•
If two diagram pieces are separated by a separator character, separating the
syntactic items that they represent by spaces is optional. For example:
means that you type:
MULTIPLY 3,4
or
MULTIPLY 3, 4
•
If a diagram piece is immediately followed by a period, putting spaces between the
syntactic item and the period is optional. For example:
means that you can type:
END PROGRAM SORT.
or
END PROGRAM SORT .
•
Diagram elements need not be on the same line. For example:
BLOCK DATA BEGIN
is equivalent to:
BLOCK DATA
BEGIN
•
Explicit spacing rules given for individual railroad diagrams override the
aforementioned rules.
VST411.vsd
integer1 integer2,
MULTIPLY
PROGRAM
.
program-name
END
VST374.vsd
BLOCK block-name BEGIN
VST184.vsd