Each railroad diagram begins with a double right arrow and ends with a right and left arrow pair. Lines beginning with a single right arrow are continuation lines. You read a railroad diagram from left to right and from top to bottom, following the direction of the arrows.
The following examples show other conventions used in railroad diagrams.
>>-| Name |---------------------------------------------------->< Name |--A--+---+-----------------------------------------------------| '-B-'
Punctuation and uppercase values must be specified exactly as shown.
Lowercase values (for example, name) indicate where to type your own text in place of the name variable.
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