Import Mapping IM

"im": {
    "address": {
      "address_type": {
        "need": "",
        "return": "return \"L\""
      },
      "city": {
        "need": "3106",
        "return": "return strings.TrimSpace(strings.TrimLeft(gdtrec.GetField(\"3106\"), strings.Fields(gdtrec.GetField(\"3106\"))[0]))"
      },
      "country": {
        "need": "3114",
        "return": "return gdtrec.GetField(\"3114\")"
      },
      "state": {
        "need": "3116",
        "return": "return gdtrec.GetField(\"3116\")"
      },
      "street_address": {
        "need": "3107",
        "return": "return gdtrec.GetField(\"3107\")"
      },
      "zip_code": {
        "need": "3106",
        "return": "return strings.TrimSpace(strings.Fields(gdtrec.GetField(\"3106\"))[0])"
      }
    },
    "insurance_info": {
      "company_region": {
        "need": "4106",
        "return": "return gdtrec.GetField(\"4106\")"
      },
      "dmp_indicator": {
        "need": "4113",
        "return": "return gdtrec.GetField(\"4113\")"
      },
      "insurance_company": {
        "need": "0202",
        "return": "return gdtrec.GetField(\"0202\")"
      },
      "insurance_company_id": {
        "need": "4111",
        "return": "return gdtrec.GetField(\"4111\")"
      },
      "insurance_status": {
        "need": "3108",
        "return": "return gdtrec.GetField(\"3108\")"
      },
      "name_of_insured": {
        "need": "",
        "return": "return \"\""
      },
      "policy_number": {
        "need": "3119",
        "return": "return gdtrec.GetField(\"3119\")"
      }
    },
    "observation": {
      "created": {
        "need": "6200 6201",
        "return": "return gdtrec.GetField(\"6200\") + gdtrec.GetField(\"6201\")"
      },
      "equipment": {
        "need": "8404",
        "return": "return gdtrec.GetField(\"8404\")"
      },
      "last_update": {
        "need": "6200 6201",
        "return": "return gdtrec.GetField(\"6200\") + gdtrec.GetField(\"6201\")"
      },
      "method": {
        "need": "8402",
        "return": "return gdtrec.GetField(\"8402\")"
      },
      "note": {
        "need": "6227",
        "return": "return gdtrec.GetField(\"6227\")"
      },
      "observer": {
        "need": "8615",
        "return": "return gdtrec.GetField(\"8615\")"
      },
      "status": {
        "need": "",
        "return": "return \"0\""
      },
      "visit_number": {
        "need": "8310",
        "return": "return gdtrec.GetField(\"8310\")"
      }
    },
    "observation_result": {
      "created": {
        "need": "6200 6201",
        "return": "return gdtrec.GetField(\"6200\") + gdtrec.GetField(\"6201\")"
      },
      "last_update": {
        "need": "6201",
        "return": "return gdtrec.GetField(\"6200\") + gdtrec.GetField(\"6201\")"
      },
      "note": {
        "need": "6227",
        "return": "return gdtrec.GetField(\"6227\")"
      },
      "result": {
        "need": "",
        "return": "return \"\""
      },
      "result_status": {
        "need": "",
        "return": "return \"\""
      },
      "result_type": {
        "need": "8402",
        "return": "return gdtrec.GetField(\"8402\")"
      }
    },
    "patient": {
      "created": {
        "need": "",
        "return": "return \"\""
      },
      "dob": {
        "need": "3103",
        "return": "return gdtrec.GetField(\"3103\")"
      },
      "email": {
        "need": "3619",
        "return": "return gdtrec.GetField(\"3619\")"
      },
      "gender": {
        "need": "3110",
        "return": "return gdtrec.GetField(\"3110\")"
      },
      "language": {
        "need": "3628",
        "return": "return gdtrec.GetField(\"3628\")"
      },
      "last_update": {
        "need": "",
        "return": "return \"\""
      },
      "marital_status": {
        "need": "",
        "return": "return \"\""
      },
      "patient_id": {
        "need": "3000",
        "return": "return gdtrec.GetField(\"3000\")"
      },
      "priority": {
        "need": "",
        "return": "return \"0\""
      },
      "race": {
        "need": "",
        "return": "return \"\""
      },
      "religion": {
        "need": "",
        "return": "return \"\""
      },
      "status": {
        "need": "",
        "return": "return \"0\""
      },
      "telephone": {
        "need": "3626",
        "return": "return gdtrec.GetField(\"3626\")"
      }
    },
    "patient_alt_id": {
      "alt_id": {
        "need": "3000",
        "return": "return gdtrec.GetField(\"3000\")"
      },
      "other_system": {
        "need": "",
        "return": "return \"P\""
      }
    },
    "patientname": {
      "degree": {
        "need": "3104",
        "return": "return gdtrec.GetField(\"3104\")"
      },
      "further_given_names": {
        "need": "3102",
        "return": "return \"\""
      },
      "given_name": {
        "need": "3102",
        "return": "return gdtrec.GetField(\"3102\")"
      },
      "name_type_code": {
        "need": "",
        "return": "return \"L\""
      },
      "prefix": {
        "need": "",
        "return": "return \"\""
      },
      "suffix": {
        "need": "",
        "return": "return \"\""
      },
      "surname": {
        "need": "3101",
        "return": "return gdtrec.GetField(\"3101\")"
      },
      "surname_prefix": {
        "need": "3100",
        "return": "return gdtrec.GetField(\"3100\")"
      }
    }
  },
IM specifies, how data read from a GDT file are placed into Internal data structures. Individually for each field in internal data structures:
"need": list of GDT fields required to fill the internal field
"return": coding of the value that is placed into the internal data field. This can consist of constants, values from the GDT file and combinations thereof.