{
  "type": "Document",
  "span": {
    "start": 1,
    "end": 16,
    "ctxt": 0
  },
  "mode": "quirks",
  "children": [
    {
      "type": "Element",
      "span": {
        "start": 0,
        "end": 0,
        "ctxt": 0
      },
      "tagName": "html",
      "namespace": "http://www.w3.org/1999/xhtml",
      "attributes": [],
      "children": [
        {
          "type": "Element",
          "span": {
            "start": 0,
            "end": 0,
            "ctxt": 0
          },
          "tagName": "head",
          "namespace": "http://www.w3.org/1999/xhtml",
          "attributes": [],
          "children": [],
          "content": null,
          "isSelfClosing": false
        },
        {
          "type": "Element",
          "span": {
            "start": 0,
            "end": 0,
            "ctxt": 0
          },
          "tagName": "body",
          "namespace": "http://www.w3.org/1999/xhtml",
          "attributes": [],
          "children": [
            {
              "type": "Element",
              "span": {
                "start": 1,
                "end": 7,
                "ctxt": 0
              },
              "tagName": "math",
              "namespace": "http://www.w3.org/1998/Math/MathML",
              "attributes": [],
              "children": [],
              "content": null,
              "isSelfClosing": false
            },
            {
              "type": "Element",
              "span": {
                "start": 7,
                "end": 11,
                "ctxt": 0
              },
              "tagName": "p",
              "namespace": "http://www.w3.org/1999/xhtml",
              "attributes": [],
              "children": [],
              "content": null,
              "isSelfClosing": false
            },
            {
              "type": "Element",
              "span": {
                "start": 11,
                "end": 16,
                "ctxt": 0
              },
              "tagName": "foo",
              "namespace": "http://www.w3.org/1999/xhtml",
              "attributes": [],
              "children": [],
              "content": null,
              "isSelfClosing": false
            }
          ],
          "content": null,
          "isSelfClosing": false
        }
      ],
      "content": null,
      "isSelfClosing": false
    }
  ]
}