{
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        "https://hebei.tianditu.gov.cn/iserver/services/data-SGS/rest/data/datasources/sgs_jc_data/datasets/HBCity/fields/CODE/VARIANCE"
    ],
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        "defaultValue": "",
        "name": "CODE",
        "caption": "CODE",
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        "isZeroLengthAllowed": true,
        "isSystemField": false
    }
}