declare header {
  Nonexistant := 27; // Unknown variable
  EBMLVersion := 2; // Illegal version
  EBMLReadVersion := 2; // Illegal version
  DocTypeVersion := 1;
  DocTypeReadVersion := 2; // Larger than DocTypeVersion
  EBMLMaxSizeLength := 0; // Illegal value
}

define elements {
  blä := a1 container; // Illegal name
  x1 := 1 int; // Illegal ID
  x2 := 80 int; // Reserved ID
  x3 := ff int; // Reserved ID
  x4 := 4001 int; // Not shortest form
  x5 := 82 foo; // Unknown type

  x6 := 83 int [ parent:blä; ] // Illegal parent name

  // Cyclic
  r1 := 84 container [ parent:r2; ]
  r2 := 85 container [ parent:r1; ]

  x7 := 86 int [ level:0; ] // Too low lower
  x8 := 87 int [ level:2..1; ] // High lower than low
  x9 := 88 int [ card:%; ] // Unknown symbol
  xa := 89 int [ def:1; def:1; ] // Two defs.
  xb := 8a int [ range:1..2,3..4,2..3; ] // Overlapping ranges
}