[
  {
    "op": "core/column-addition",
    "engineConfig": {
      "facets": [],
      "mode": "record-based"
    },
    "baseColumnName": "2000",
    "expression": "grel:forEach(value.split('␟'), isbn, if(isbn.length() == 10, if(with(round(sum(forRange(1,10,1,i,toNumber(isbn[i-1])*i))%11),x,if(x == 10, 'X', x)).toString() == isbn[9], null, isbn), if(isbn.length() == 13, if(((10-(sum(forRange(0,12,1,i,toNumber(isbn[i])*(1+(i%2*2)) )) %10)) %10).toString()[0] == isbn[12], null, isbn), null))).join('␟')",
    "onError": "set-to-blank",
    "newColumnName": "2009",
    "columnInsertIndex": 4
  {
    "op": "core/text-transform",
    "engineConfig": {
      "facets": [],
      "mode": "record-based"
    },
    "columnName": "2000",
    "expression": "grel:forEach(value.split('␟'), isbn, if(isbn.length() == 10, if(with(round(sum(forRange(1,10,1,i,toNumber(isbn[i-1])*i))%11),x,if(x == 10, 'X', x)).toString() == isbn[9], isbn, null), if(isbn.length() == 13, if(((10-(sum(forRange(0,12,1,i,toNumber(isbn[i])*(1+(i%2*2)) )) %10)) %10).toString()[0] == isbn[12], isbn, null), null))).join('␟')",
    "onError": "keep-original",
    "repeat": false,
    "repeatCount": 10
  }
]