{
    "id": "BTX.7",
    "type": "Field",
    "position": "BTX.7",
    "name": "CP Lot Number",
    "length": 22,
    "usage": "C",
    "rpt": "1",
    "dataType": "EI",
    "dataTypeName": "Entity Identifier",
    "tableId": null,
    "tableName": null,
    "description": "This field identifies the lot number for blood derivatives or commercially supplied items used as accessories to transfusion.\r\n\r\nThis field is required for commercial blood products and is not applicable for blood component messag.",
    "sample": "",
    "fields": [
        {
            "id": "BTX.7.1",
            "type": "Component",
            "position": "BTX.7.1",
            "length": 199,
            "dataType": "ST",
            "dataTypeName": "String Data",
            "usage": "O",
            "rpt": "1",
            "tableId": null,
            "tableName": null,
            "name": "Entity Identifier",
            "description": "The first component, <entity identifier>, is usually defined to be unique within the series of identifiers created by the <assigning authority>, defined by a hierarchic designator, represented by components 2 through 4. See Section 2.A.33, \"HD - hierarchic designator\"."
        },
        {
            "id": "BTX.7.2",
            "type": "Component",
            "position": "BTX.7.2",
            "length": 20,
            "dataType": "IS",
            "dataTypeName": "Coded value for user-defined tables",
            "usage": "O",
            "rpt": "1",
            "tableId": "0363",
            "tableName": "Assigning authority",
            "name": "Namespace Id",
            "description": "The assigning authority is a unique identifier of the system (or organization or agency or department) that creates the data. Refer to User-defined Table 0363 - Assigning authority for suggested values."
        },
        {
            "id": "BTX.7.3",
            "type": "Component",
            "position": "BTX.7.3",
            "length": 199,
            "dataType": "ST",
            "dataTypeName": "String Data",
            "usage": "C",
            "rpt": "1",
            "tableId": null,
            "tableName": null,
            "name": "Universal Id",
            "description": null
        },
        {
            "id": "BTX.7.4",
            "type": "Component",
            "position": "BTX.7.4",
            "length": 6,
            "dataType": "ID",
            "dataTypeName": "Coded values for HL7 tables",
            "usage": "C",
            "rpt": "1",
            "tableId": "0301",
            "tableName": "Universal ID type",
            "name": "Universal Id Type",
            "description": null
        }
    ]
}