{
  "name": "SSUID",
  "label": "Sample unit identifier. This identifier is created by scrambling together PSU, Sequence #1, Sequence #2, and the Frame Indicator for a case. It may be used in matching sample units from different waves.",
  "predicateType": "string",
  "group": "N/A",
  "limit": 0,
  "values": {
    "item": {
      "-999": "NA-Missing"
    }
  }
}