ba-sachsen-pica/bibliotheca/config/main/2000.json

[
  {
    "op": "core/column-addition",
    "engineConfig": {
      "facets": [],
      "mode": "record-based"
    },
    "baseColumnName": "M|ISBN",
    "expression": "grel:[ forNonBlank(cells['M|ISBN'].value.replace('-',''),v,if(and(isNumeric(v), or(v.length() == 10, v.length() == 13)), v, null), null), forNonBlank(cells['M|ISBN2'].value.replace('-',''),v,if(and(isNumeric(v), or(v.length() == 10, v.length() == 13)), v, null), null) ].uniques().join('␟').toUppercase()",
    "onError": "set-to-blank",
    "newColumnName": "2000",
    "columnInsertIndex": 3
  }
]