TAL Reference Manual

About This Manual
TAL Reference Manual—526371-001
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Notation Conventions
Notation Conventions
Railroad Diagrams
This manual presents syntax in railroad diagrams. To use a railroad diagram, follow the
direction of the arrows and specify syntactic items as indicated by the diagram and the
term definitions that follow the diagram. Here is an example of a railroad diagram:
The parts of the diagram have the following meanings:
Branching
Branching lines indicate a choice, such as:
SOURCE file-name
define-name
assign-name
( section-name
,
)
VSTAB02.vsd
SOURCE
Specify the keyword as shown, using uppercase or lowercase
,
Specify the symbol or punctuation as shown.
Supply the informatin indicated, using uppercase or lowercase
section-name
Required choice. Specify one of the items.
Optional choice. Specify one or none of the items.
Repeatable choice. Specify one or more of the items.
item1
item2
item1
item2
item1
,