json是否有固定格式在可折叠树布局中使用它？

Question

我正在使用d3.js可视化可折叠树布局中的数据。它与flare.json数据工作正常，但似乎有其他json文件有问题。我的json文件有效。

我得到的错误如下：Uncaught TypeError：无法读取未定义的属性'children'我的json是here

{
"name":"dummy",
"children":
[

{

    "date": "20040309",
    "name": "US", 
    "id": "27",
    "kind": "S1",
    "application_type": "not found",
    "children": [
        {"length": 27,
            "type": "US",
            "id": "28",
            "kind": "S",
            "name": "Mewdows",
            "date": "19730700",
            "main_classification": "D 2907"
        },
        {"length": 27,
            "type": "US",
            "id": "29",
            "kind": "S",
            "name": "Askew",
            "date": "19731100",
            "main_classification": "D 2907"
        },
        {"length": 27,
            "type": "US",
            "id": "30",
            "kind": "S",
            "name": "Adams",
            "date": "20020500",
            "main_classification": "D 2969"
        },
        {"length": 27,
            "type": "US",
            "id": "31",
            "kind": "S",
            "name": "Adams et al.",
            "date": "20020500",
            "main_classification": "D 2969"
        },
        {"length": 27,
            "type": "US",
            "id": "32",
            "kind": "S",
            "name": "Adams",
            "date": "20020800",
            "main_classification": "D 2969"
        },
        {"length": 27,
            "type": "US",
            "id": "33",
            "kind": "S",
            "name": "Adams",
            "date": "20030700",
            "main_classification": "D 2969"
        },
        {"length": 27,
            "type": "US",
            "id": "34",
            "kind": "S",
            "name": "Robbins",
            "date": "20031000",
            "main_classification": "D 2969"
        }
    ],
    "classification_national": "D 2969",
    "length": 7
},
{

    "date": "20040309",
    "name": "US",
    "id": "30997425",
    "kind": "S1",
    "application_type": "not found",
    "children": [
        {"length": 7,
            "type": "US",
            "id": "35",
            "kind": "A",
            "name": "Alba et al.",
            "date": "19851000",
            "main_classification": "323308"
        },
        {"length": 7,
            "type": "US",
            "id": "36",
            "kind": "A",
            "name": "Dobberstein",
            "date": "19851000",
            "main_classification": "323308"
        }
    ],
    "classification_national": "D13110",
    "length": 2
},

{

    "date": "20040309",
    "name": "US",
    "id": "56992283",
    "kind": "B2",
    "application_type": "not found",
    "children": [
        { "length": 114,
            "type": "US",
            "id": "151",
            "kind": "A",
            "name": "Demetre",
            "date": "19770300",
            "main_classification": "271183"
        },
        {"length": 114,
            "type": "US",
            "id": "152",
            "kind": "A",
            "name": "Carstedt",
            "date": "19771100",
            "main_classification": "271183"
        },
        {"length": 114,
            "type": "US",
            "id": "153",
            "kind": "B1",
            "name": "Teumer et al.",
            "date": "20010100",
            "main_classification": "271194"
        },
        {"length": 114,
            "type": "DE",
            "id": "154",
            "kind": "not found",
            "name": "not found",
            "date": "19751200",
            "main_classification": "not found"
        },
        {"length": 114,
            "type": "DE",
            "id": "155",
            "kind": "not found",
            "name": "not found",
            "date": "19770100",
            "main_classification": "not found"
        },
        {"length": 114,
            "type": "DE",
            "id": "156",
            "kind": "not found",
            "name": "not found",
            "date": "19800300",
            "main_classification": "not found"
        }
    ],
    "classification_national": "271276",
    "length": 6
}
]
}

任何帮助将不胜感激。