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Appendix SDF syntax description

Metasyntax

Representation Meaning Examples

UPPERCASE

LETTERS

Uppercase letters denote keywords

(command, statement and operand

names, keyword values) and

constant operand values.

Keywords begin with *

HELP-SDF

SCREEN-STEPS = *NO

UPPERCASE

LETTERS

in boldface

Uppercase letters printed in

boldface denote guaranteed or

suggested abbreviations of

keywords.

GUIDANCE-MODE = *YES

=

The equals sign connects an

operand name with the associated

operand values.

GUIDANCE-MODE = *NO

< >

Angle brackets denote variables

whose range of values is described

by data types and sufﬁxes (see

Tables 10 and 11).

SYNTAX-FILE = <filename 1..54>

Underscoring Underscoring denotes the default

value of an operand.

GUIDANCE-MODE = *NO

/

A slash serves to separate

alternative operand values.

NEXT-FIELD = *NO / *YES

(…)

Parentheses denote operand

values that initiate a structure.

,UNGUIDED-DIALOG = *YES (...) / *NO

[ ]

Square brackets denote operand

values which introduce a structure

and are optional. The subsequent

structure can be speciﬁed without

the initiating operand value.

SELECT = [*BY-ATTRIBUTES](...)

Indentation Indentation indicates that the

operand is dependent on a higher-

ranking operand.

,GUIDED-DIALOG = *YES (...)

*YES(...)

 SCREEN-STEPS = *NO /

 *YES

Table 9: Metasyntax (part 1 of 2)