Required and optional keywords

All keywords in a command are required except when an option is available.


Optional keywords are indicated in the command scheme with the following signs enclosing the keywords concerned:

  |  KEY1word ...... data ....... |
 <                                 >
  |  KEY2word ...... data ....... |

For the above example it may appear as:

            |  KEY2word data |
 KEY1word  <                  >
            |  KEY3word data |

In case the user does not indicate an option in a command, SWAN chooses the alternative indicated with an arrow (->) appearing in the command scheme (the default option). In the above example, it may appear as:

            |    KEY2word data |
 KEY1word  <                    >
            | -> KEY3word data |

where KEY3WORD is the default option.