{
  "description": "Confirm success using custom length, array of characters to wordbreak on and omission.",
  "expr": "$truncate('1234567890123456 , 789012345678901234567890',{'length':20,'omission':'...','wordbreakregex':'[\\\\s\\\\.%,:;\\\\?_]'})",
  "dataset": "metadata",
  "bindings": {},
  "result": "1234567890123456..."
}