How to Use the Syntax Graphs

The commands described in this chapter are presented in the form of syntax graphs.

• Syntax graphs are read from top left to bottom right. The start point is shown by >, and you can follow any path through the graph until the exit point, shown by >, is reached.

• Points marked with a plus sign (+) are option junctions which allow you to input any one of the commands to the right of the junction. For example:

      >----+--- ABC -----.

           |             |

           |--- PQR -----|

           |             |

           ‘-------------+--->

• means you can type in ABC or PQR or just press Enter to get the default option.

• Text in angle brackets <. . . > is the name of another syntax graph. This convention is used for syntax which occurs in many places. The graphs referred to are described at the end of this section. For example:

      >----+--- ABC -----.

           |             |

           |--- PQR -----|

           |             |

           |--- <dia> ---|

           |             |

           ‘-------------+--->

• means you can type in ABC or PQR or any command allowed by the syntax given in diagram <dia> or just press Enter to get the default option.

• Points marked with an asterisk (*) are loop back junctions. Command options following these may be repeated as required. For example:

                .-----<-------.

               /              |

          >---*--- option1 ---|

              |               |

              |--- option2 ---|

              |               |

              ‘--- option3 ---+--->

• means that you can enter any combination of option1 and/or option2 and/or option3, where the options can be commands, other syntax diagrams, or command arguments.

• The simplified format:

               .----<------.

              /            |

         >---*--- name ----+--->

• means that you may type in a list of Design names, separated by at least one space.