Understanding the API Results

For search queries (such as: https://api.fda.gov/device/registrationlisting.json), the results section includes matching Device Registration & Listings reports returned by the API.

{
  "establishment_type": [
    "Manufacture Medical Device"
  ],
  "k_number": "",
  "pma_number": "P990041",
  "products": [
    {
      "created_date": "2007-12-18",
      "exempt": "",
      "openfda": {
        "device_class": "3",
        "device_name": "Test, Hepatitis B (B Core, Be Antigen, Be Antibody, B Core Igm)",
        "medical_specialty_description": "Unknown",
        "regulation_number": ""
      },
      "owner_operator_number": "9051149",
      "product_code": "LOM"
    }
  ],
  "proprietary_name": [
    "ETI-AB-EBK PLUS"
  ],
  "registration": {
    "address_line_1": "VIA CRESCENTINO, snc",
    "address_line_2": "",
    "city": "SALUGGIA Vercelli",
    "fei_number": "3002808212",
    "initial_importer_flag": "N",
    "iso_country_code": "IT",
    "name": "DIASORIN S.P.A.",
    "owner_operator": {
      "contact_address": {
        "address_1": "Via Crescentino, snc",
        "address_2": "",
        "city": "Saluggia",
        "iso_country_code": "IT",
        "postal_code": "13040",
        "state_code": "IT-VC",
        "state_province": ""
      },
      "firm_name": "DiaSorin S.p.A",
      "official_correspondent": {},
      "owner_operator_number": "9051149"
    },
    "postal_code": "13040",
    "reg_expiry_date_year": "2016",
    "registration_number": "9610240",
    "state_code": "",
    "status_code": "1",
    "us_agent": {
      "address_line_1": "1951 NORTHWESTERN AVE.",
      "address_line_2": "",
      "bus_phone_area_code": "651",
      "bus_phone_extn": "",
      "bus_phone_num": "4399710",
      "business_name": "DIASORIN INC.",
      "city": "STILLWATER",
      "email_address": "john.walter@diasorin.com",
      "fax_area_code": "651",
      "fax_num": "3515669",
      "iso_country_code": "US",
      "name": "John C. Walter",
      "postal_code": "",
      "state_code": "MN",
      "zip_code": "55082"
    },
    "zip_code": ""
  }
}

For count queries (such as: https://api.fda.gov/device/registrationlisting.json?count=establishment_type.exact), the results section will look something like the following:

[
  {
    "term": "Manufacture Medical Device",
    "count": 141611
  },
  {
    "term": "Manufacture Medical Device for Another Party (Contract Manufacturer)",
    "count": 64890
  },
  {
    "term": "Export Device to the United States But Perform No Other Operation on Device",
    "count": 44728
  },
  {
    "term": "Develop Specifications But Do Not Manufacture At This Facility",
    "count": 43162
  },
  {
    "term": "Repack or Relabel Medical Device",
    "count": 42628
  },
  {
    "term": "Complaint File Establishment per 21 CFR 820.198",
    "count": 34282
  },
  {
    "term": "Sterilize Medical Device for Another Party (Contract Sterilizer)",
    "count": 31910
  },
  {
    "term": "Foreign Private Label Distributor",
    "count": 2063
  },
  {
    "term": "Manufacture Device in the United States for Export Only",
    "count": 1985
  },
  {
    "term": "Remanufacture Medical Device",
    "count": 1892
  },
  {
    "term": "Reprocess Single-Use Device",
    "count": 675
  }
]