{
    "from_class": "code2_code2",
    "to_class": "generic_code",
    "class_id": 4,
    "description": "通知单编码升级到通用编码",
    "properties": [
        {
            "from_property": "db_code",
            "to_property": "code_value",
            "conversion_method": "none"
        },
        {
            "from_property": "db_status",
            "to_property": "code_state",
            "conversion_method": "lookup",
            "lookup_map": [
                {
                    "from_value": "0",
                    "to_value": "design"
                },
                {
                    "from_value": "1",
                    "to_value": "pending_review"
                },
                {
                    "from_value": "2",
                    "to_value": "release"
                },
                {
                    "from_value": "3",
                    "to_value": "disable"
                }
            ]
        },
        {
            "from_property": "db_creator",
            "to_property": "creator",
            "conversion_method": "none"
        },
        {
            "from_property": "db_createtime",
            "to_property": "creation_datetime",
            "conversion_method": "none"
        },
        {
            "from_property": "db_desc",
            "to_property": "description",
            "conversion_method": "none",
            "description": "备注"
        },
        {
            "from_property": "db_disable",
            "to_property": "",
            "conversion_method": "none",
            "description": "禁用人-25版本废弃,不升级"
        },
        {
            "from_property": "db_disabledate",
            "to_property": "",
            "conversion_method": "none",
            "description": "禁用日期-25版本废弃,不升级"
        },
        {
            "from_property": "db_project_no",
            "to_property": "",
            "conversion_method": "none",
            "description": "项目号-25版本废弃,不升级"
        },
        {
            "from_property": "db_project_name",
            "to_property": "",
            "conversion_method": "none",
            "description": "项目名称-25版本废弃,不升级"
        },
        {
            "from_property": "db_wjfs",
            "to_property": "",
            "conversion_method": "none",
            "description": "文件份数-25版本废弃,不升级"
        },
        {
            "from_property": "db_tzfs",
            "to_property": "",
            "conversion_method": "none",
            "description": "图纸份数-25版本废弃,不升级"
        },
        {
            "from_property": "db_xfsj",
            "to_property": "",
            "conversion_method": "none",
            "description": "下发时间-25版本废弃,不升级"
        }
    ]
}