How to read syntax diagrams

The following syntax diagram example shows the syntax for the #pragma comment directive.

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 >>-#--pragma--comment--(-------compiler---------------------------)-><
                          |                                     |
                          +-----date----------------------------+
                          |                                     |
                          +-----timestamp-----------------------+
                          |                                     |
                          +--+--copyright--+--+-----------------+
                             |             |  |                 | 
                             |             |  |                 |
                             +--user-------+  +--,-"characters"-+

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The following examples of the #pragma comment directive are syntactically correct according to the diagram shown above:

   #pragma
   comment(date)
   #pragma comment(user)
   #pragma comment(copyright,"This text will appear in the module")