Glossary

data type
	Basic syntax type, which can be checked for syntax errors by the SDF command processor. The possible data types are shown in the table 2 in SDF syntax description chapter.
domain
	A set of commands, compiled according to user criteria, from which the user can select the command desired in guided dialog. Domains may overlap.
list
	Assignment of several operand values to one operand in a command or statement. The list is formed by enclosing the values, separated by commas, within parentheses. Whether a given operand permits a list is an attribute of that operand. List parentheses are distinguishable from parentheses enclosing a structure by means of the context.
structure
	Syntactical combination of several operands. This combination is expressed syntactically by enclosing the operands in parentheses. Structure parentheses are distinguishable from parentheses enclosing a list by means of the context. A structure can either be an operand value itself or it can be dependent on the specification of an input alternative that introduces the structure.