The following is the GDL source of the shell dependencies example graph.

graph: {title: "Shells"
        splines: yes
        layoutalgorithm: minbackward
        layout_nearfactor: 0
        layout_downfactor: 100
        layout_upfactor  : 100
// First the time scale

node.height:26
node.width: 60
node.borderwidth: 0
edge.linestyle: dashed

node: { title:"1972" level:1 horizontal_order:1 }
node: { title:"1976" level:2 horizontal_order:1 }
node: { title:"1978" level:3 }
node: { title:"1980" level:4 }
node: { title:"1982" level:5 horizontal_order:1 }
node: { title:"1984" level:6 }
node: { title:"1986" level:7 }
node: { title:"1988" level:8 }
node: { title:"1990" level:9 }
node: { title:"future" level:10 horizontal_order:1 }

edge: { source:"1972" target:"1976" }
edge: { source:"1976" target:"1978" }
edge: { source:"1978" target:"1980" }
edge: { source:"1980" target:"1982" }
edge: { source:"1982" target:"1984" }
edge: { source:"1984" target:"1986" }
edge: { source:"1986" target:"1988" }
edge: { source:"1988" target:"1990" }
edge: { source:"1990" target:"future"}

// We need some invisible edge to make the graph fully connected.
// Otherwise, the horizontal_order attribute would not work.

edge.linestyle: invisible
edge: { source:"ksh-i" target:"Perl" priority:0 }
edge: { source:"tcsh"  target:"tcl"  priority:0 }
nearedge: { source:"1988" target:"rc" }
nearedge: { source:"rc" target:"Perl" }

// Now the shells themselves

node.height:-1   // i.e. unspecified
node.width: -1
node.borderwidth: 2
edge.linestyle: solid

node: { title:"Thompson"   level:1  horizontal_order:2 }
node: { title:"Mashey"     level:2  horizontal_order:3 }
node: { title:"Bourne"     level:2  horizontal_order:2 }
node: { title:"Formshell"  level:3  }
node: { title:"csh"        level:3  shape:triangle }
node: { title:"esh"        level:4  horizontal_order:2 }
node: { title:"vsh"        level:4  }
node: { title:"ksh"        level:5  horizontal_order:3
                                    shape:ellipse }
node: { title:"System V"   level:5  horizontal_order:5 }
node: { title:"v9sh"       level:6  }
node: { title:"tcsh"       level:6  shape:triangle }
node: { title:"ksh-i"      level:7  shape:ellipse  }
node: { title:"KornShell"  level:8  shape:ellipse  }
node: { title:"Perl"       level:8  }
node: { title:"rc"         level:8  }
node: { title:"tcl"        level:9  shape:rhomb  }
node: { title:"Bash"       level:9  }
node: { title:"POSIX"      level:10 horizontal_order:3 }
node: { title:"Rksh-POSIX" level:10 horizontal_order:2
                                    shape:ellipse }

edge: { source:"Thompson"  target:"Mashey" }
edge: { source:"Thompson"  target:"Bourne" }
edge: { source:"Thompson"  target:"csh" horizontal_order:4 }
edge: { source:"Bourne"    target:"ksh"    }
edge: { source:"Bourne"    target:"esh"    }
edge: { source:"Bourne"    target:"vsh"    }
edge: { source:"Bourne"    target:"System V"}
edge: { source:"Bourne"    target:"v9sh"   }
edge: { source:"Bourne"    target:"Formshell"}
edge: { source:"Bourne"    target:"Bash"   }
edge: { source:"csh"       target:"tcsh"   }
edge: { source:"csh"       target:"ksh"    }
edge: { source:"Formshell" target:"ksh" horizontal_order:4 }
edge: { source:"esh"       target:"ksh"    }
edge: { source:"vsh"       target:"ksh"    }
edge: { source:"ksh"       target:"ksh-i"  }
edge: { source:"System V"  target:"POSIX"  }
edge: { source:"v9sh"      target:"rc"     }
edge: { source:"ksh-i"     target:"KornShell"}
edge: { source:"ksh-i"     target:"Bash"   }
edge: { source:"KornShell" target:"Bash"   }
edge: { source:"KornShell" target:"POSIX"  }
edge: { source:"KornShell" target:"ksh-POSIX"}
}

Last modified on 30 April 2002 by webmaster. © 2000-2002 AbsInt.
URL: http://www.aisee.com/manual/unix/43.htm

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