{
    "id": "AIS.3",
    "type": "Field",
    "position": "AIS.3",
    "name": "Universal Service Identifier",
    "length": 250,
    "usage": "R",
    "rpt": "1",
    "dataType": "CE",
    "dataTypeName": "Coded Element",
    "tableId": null,
    "tableName": null,
    "description": "This field contains an identifier code for a service to be scheduled. This field may contain a universal service identifier describing the observation/test/battery/procedure or other activity that is to be performed during the requested appointment, similar to the universal service identifier defined for the OBR segment. This code can be based on local and/or universal codes. The use of universal codes is recommended.",
    "sample": "",
    "fields": [
        {
            "id": "AIS.3.1",
            "type": "Component",
            "position": "AIS.3.1",
            "length": 20,
            "dataType": "ST",
            "dataTypeName": "String Data",
            "usage": "O",
            "rpt": "1",
            "tableId": null,
            "tableName": null,
            "name": "Identifier",
            "description": "Sequence of characters (the code) that uniquely identifies the item being referenced. Different coding schemes will have different elements here."
        },
        {
            "id": "AIS.3.2",
            "type": "Component",
            "position": "AIS.3.2",
            "length": 199,
            "dataType": "ST",
            "dataTypeName": "String Data",
            "usage": "O",
            "rpt": "1",
            "tableId": null,
            "tableName": null,
            "name": "Text",
            "description": "The descriptive or textual name of the identifier, e.g., myocardial infarction or X-ray impression."
        },
        {
            "id": "AIS.3.3",
            "type": "Component",
            "position": "AIS.3.3",
            "length": 20,
            "dataType": "ID",
            "dataTypeName": "Coded values for HL7 tables",
            "usage": "O",
            "rpt": "1",
            "tableId": "0396",
            "tableName": "Coding system",
            "name": "Name Of Coding System",
            "description": "Identifies the coding scheme being used in the identifier component. The combination of the identifier and name of coding system components will be a unique code for a data item. Each system has a unique identifier."
        },
        {
            "id": "AIS.3.4",
            "type": "Component",
            "position": "AIS.3.4",
            "length": 20,
            "dataType": "ST",
            "dataTypeName": "String Data",
            "usage": "O",
            "rpt": "1",
            "tableId": null,
            "tableName": null,
            "name": "Alternate Identifier",
            "description": "An alternate sequence of characters (the code) that uniquely identifies the item being referenced. See usage note in section introduction."
        },
        {
            "id": "AIS.3.5",
            "type": "Component",
            "position": "AIS.3.5",
            "length": 199,
            "dataType": "ST",
            "dataTypeName": "String Data",
            "usage": "O",
            "rpt": "1",
            "tableId": null,
            "tableName": null,
            "name": "Alternate Text",
            "description": "The descriptive or textual name of the alternate identifier. See usage note in section introduction."
        },
        {
            "id": "AIS.3.6",
            "type": "Component",
            "position": "AIS.3.6",
            "length": 20,
            "dataType": "ID",
            "dataTypeName": "Coded values for HL7 tables",
            "usage": "O",
            "rpt": "1",
            "tableId": "0396",
            "tableName": "Coding system",
            "name": "Name Of Alternate Coding System",
            "description": "Identifies the coding scheme being used in the alternate identifier component."
        }
    ]
}