{
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        "https://hebei.tianditu.gov.cn/iserver/services/data-HBDATA-2/rest/data/datasources/HBDATA/datasets/PLAPT/fields/poi_id/SUM",
        "https://hebei.tianditu.gov.cn/iserver/services/data-HBDATA-2/rest/data/datasources/HBDATA/datasets/PLAPT/fields/poi_id/VARIANCE"
    ],
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        "defaultValue": "",
        "name": "poi_id",
        "caption": "poi_id",
        "type": "WTEXT",
        "maxLength": 10,
        "isZeroLengthAllowed": true,
        "isSystemField": false
    }
}