1 OPEN
 The  OPEN  statement  opens  a  file   for   processing.    It   transfers
 user-specified  file  characteristics  to  Record  Management Services and
 verifies the results.

 Examples

 OPEN "INPUT.DAT" FOR INPUT AS FILE #4%,     &
      ORGANIZATION SEQUENTIAL FIXED

2 Syntax

                     [ FOR INPUT  ]
     OPEN file-spec1 [ FOR OUTPUT ] AS [ FILE ] chnl-exp1 [,
          open-clause ]...

       open-clause:  {                  { VIRTUAL    }                   }
                     {                  { UNDEFINED  }                   }
                     { [ ORGANIZATION ] { INDEXED    } [ STREAM   ]      }
                     {                  { SEQUENTIAL } [ VARIABLE ]      }
                     {                  { RELATIVE   } [ FIXED    ]      }

                      {       { NONE   }                                 }
                      {       { READ   }                                 }
                      { ALLOW { WRITE  }                                 }
                      {       { MODIFY }                                 }

                      {        { APPEND  }                               }
                      {        { READ    }                               }
                      { ACCESS { WRITE   }                               }
                      {        { MODIFY  }                               }
                      {        { SCRATCH }                               }

                      {            { LIST    }                           }
                      { RECORDTYPE { FORTRAN }                           }
                      {            { NONE    }                           }
                      {            { ANY     }                           }

                      { RECORDSIZE int-exp1                              }

                      { FILESIZE int-exp2                                }

                      { WINDOWSIZE int-exp3                              }

                      { TEMPORARY                                        }

                      { CONTIGUOUS                                       }

                      { MAP map-name                                     }

                      { CONNECT chnl-exp2                                }

                      { BUFFER int-exp4                                  }

                      { USEROPEN sub-name                                }

                      { DEFAULTNAME file-spec2                           }

                      { EXTENDSIZE int-exp5                              }

                      { BLOCKSIZE int-exp8                               }

                      { NOREWIND                                         }

                      { NOSPAN                                           }

                      { SPAN                                             }

                      { BUCKETSIZE int-exp9                              }

                      { PRIMARY [ KEY ] key [ DUPLICATES ]

                                     [ ASCENDING  ]
                                     [ DESCENDING ]                      }

                      { ALTERNATE [ KEY ] key [ DUPLICATES ] [ CHANGES ]

                                     [ ASCENDING  ]
                                     [ DESCENDING ]                      }

                      { UNLOCK EXPLICIT                                  }

        key:          { str-unsubs-var                         }
                      { int-unsubs-var                         }
                      { decimal-unsubs-var                     }
                      { (str-unsubs-var1 ,... str-unsubs-var8) }