You are looking at the HTML representation of the JSON format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the JSON format, set format=json.
See the complete documentation, or API help for more information.
{
    "query": {
        "namespaces": {
            "-2": {
                "id": -2,
                "case": "case-sensitive",
                "*": "\u5a92\u4f53\u6587\u4ef6",
                "canonical": "Media"
            },
            "-1": {
                "id": -1,
                "case": "first-letter",
                "*": "\u7279\u6b8a",
                "canonical": "Special"
            },
            "0": {
                "id": 0,
                "case": "case-sensitive",
                "*": "",
                "subpages": "",
                "content": "",
                "nonincludable": ""
            },
            "1": {
                "id": 1,
                "case": "case-sensitive",
                "*": "\u8ba8\u8bba",
                "canonical": "Talk",
                "nonincludable": ""
            },
            "2": {
                "id": 2,
                "case": "case-sensitive",
                "*": "\u7528\u6237",
                "subpages": "",
                "canonical": "User",
                "nonincludable": ""
            },
            "3": {
                "id": 3,
                "case": "case-sensitive",
                "*": "\u7528\u6237\u8ba8\u8bba",
                "canonical": "User talk",
                "nonincludable": ""
            },
            "4": {
                "id": 4,
                "case": "case-sensitive",
                "*": "Blueidea",
                "subpages": "",
                "canonical": "Project",
                "nonincludable": ""
            },
            "5": {
                "id": 5,
                "case": "case-sensitive",
                "*": "Blueidea\u8ba8\u8bba",
                "canonical": "Project talk",
                "nonincludable": ""
            },
            "6": {
                "id": 6,
                "case": "case-sensitive",
                "*": "\u6587\u4ef6",
                "canonical": "File",
                "nonincludable": ""
            },
            "7": {
                "id": 7,
                "case": "case-sensitive",
                "*": "\u6587\u4ef6\u8ba8\u8bba",
                "canonical": "File talk",
                "nonincludable": ""
            },
            "8": {
                "id": 8,
                "case": "first-letter",
                "*": "MediaWiki",
                "subpages": "",
                "canonical": "MediaWiki",
                "nonincludable": ""
            },
            "9": {
                "id": 9,
                "case": "first-letter",
                "*": "MediaWiki\u8ba8\u8bba",
                "canonical": "MediaWiki talk",
                "nonincludable": ""
            },
            "10": {
                "id": 10,
                "case": "case-sensitive",
                "*": "\u6a21\u677f",
                "subpages": "",
                "canonical": "Template"
            },
            "11": {
                "id": 11,
                "case": "case-sensitive",
                "*": "\u6a21\u677f\u8ba8\u8bba",
                "canonical": "Template talk",
                "nonincludable": ""
            },
            "12": {
                "id": 12,
                "case": "case-sensitive",
                "*": "\u5e2e\u52a9",
                "subpages": "",
                "canonical": "Help",
                "nonincludable": ""
            },
            "13": {
                "id": 13,
                "case": "case-sensitive",
                "*": "\u5e2e\u52a9\u8ba8\u8bba",
                "canonical": "Help talk",
                "nonincludable": ""
            },
            "14": {
                "id": 14,
                "case": "case-sensitive",
                "*": "\u5206\u7c7b",
                "subpages": "",
                "canonical": "Category",
                "nonincludable": ""
            },
            "15": {
                "id": 15,
                "case": "case-sensitive",
                "*": "\u5206\u7c7b\u8ba8\u8bba",
                "canonical": "Category talk",
                "nonincludable": ""
            },
            "100": {
                "id": 100,
                "case": "case-sensitive",
                "*": "URL",
                "canonical": "URL",
                "nonincludable": ""
            },
            "101": {
                "id": 101,
                "case": "case-sensitive",
                "*": "URL talk",
                "canonical": "URL talk",
                "nonincludable": ""
            }
        }
    }
}