{
  "oxygen_charge_state_distribution": {
    "ISTP.UNITS.Empty": "VAR_TYPE = 'data' and UNITS.strip() = ''."
  },
  "carbon_charge_state_distribution": {
    "ISTP.UNITS.Empty": "VAR_TYPE = 'data' and UNITS.strip() = ''."
  },
  "oxygen_charge_state": {
    "ISTP.UNITS.Empty": "VAR_TYPE = 'support_data' and UNITS.strip() = ''."
  },
  "carbon_charge_state": {
    "ISTP.UNITS.Empty": "VAR_TYPE = 'support_data' and UNITS.strip() = ''."
  }
}