You are looking at the HTML representation of the YAML 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 YAML format, set format=yaml.
See the complete documentation, or API help for more information.
{
    "query": {
        "namespaces": {
            "-2": {
                "id": -2,
                "case": "first-letter",
                "*": "Medio",
                "canonical": "Media"
            },
            "-1": {
                "id": -1,
                "case": "first-letter",
                "*": "Especial",
                "canonical": "Special"
            },
            "0": {
                "id": 0,
                "case": "first-letter",
                "*": "",
                "subpages": "",
                "content": ""
            },
            "1": {
                "id": 1,
                "case": "first-letter",
                "*": "Discusi\u00f3n",
                "subpages": "",
                "canonical": "Talk"
            },
            "2": {
                "id": 2,
                "case": "first-letter",
                "*": "Usuario",
                "subpages": "",
                "canonical": "User"
            },
            "3": {
                "id": 3,
                "case": "first-letter",
                "*": "Usuario discusi\u00f3n",
                "subpages": "",
                "canonical": "User talk"
            },
            "4": {
                "id": 4,
                "case": "first-letter",
                "*": "RBEMWiki",
                "canonical": "Project"
            },
            "5": {
                "id": 5,
                "case": "first-letter",
                "*": "RBEMWiki discusi\u00f3n",
                "subpages": "",
                "canonical": "Project talk"
            },
            "6": {
                "id": 6,
                "case": "first-letter",
                "*": "Archivo",
                "canonical": "File"
            },
            "7": {
                "id": 7,
                "case": "first-letter",
                "*": "Archivo discusi\u00f3n",
                "subpages": "",
                "canonical": "File talk"
            },
            "8": {
                "id": 8,
                "case": "first-letter",
                "*": "MediaWiki",
                "subpages": "",
                "canonical": "MediaWiki"
            },
            "9": {
                "id": 9,
                "case": "first-letter",
                "*": "MediaWiki discusi\u00f3n",
                "subpages": "",
                "canonical": "MediaWiki talk"
            },
            "10": {
                "id": 10,
                "case": "first-letter",
                "*": "Plantilla",
                "canonical": "Template"
            },
            "11": {
                "id": 11,
                "case": "first-letter",
                "*": "Plantilla discusi\u00f3n",
                "subpages": "",
                "canonical": "Template talk"
            },
            "12": {
                "id": 12,
                "case": "first-letter",
                "*": "Ayuda",
                "canonical": "Help"
            },
            "13": {
                "id": 13,
                "case": "first-letter",
                "*": "Ayuda discusi\u00f3n",
                "subpages": "",
                "canonical": "Help talk"
            },
            "14": {
                "id": 14,
                "case": "first-letter",
                "*": "Categor\u00eda",
                "canonical": "Category"
            },
            "15": {
                "id": 15,
                "case": "first-letter",
                "*": "Categor\u00eda discusi\u00f3n",
                "subpages": "",
                "canonical": "Category talk"
            },
            "100": {
                "id": 100,
                "case": "first-letter",
                "*": "Table",
                "canonical": "Table"
            },
            "101": {
                "id": 101,
                "case": "first-letter",
                "*": "Table talk",
                "canonical": "Table talk"
            },
            "274": {
                "id": 274,
                "case": "first-letter",
                "*": "Widget",
                "canonical": "Widget"
            },
            "275": {
                "id": 275,
                "case": "first-letter",
                "*": "Widget talk",
                "subpages": "",
                "canonical": "Widget talk"
            },
            "500": {
                "id": 500,
                "case": "first-letter",
                "*": "Esperanto",
                "canonical": "Esperanto"
            },
            "501": {
                "id": 501,
                "case": "first-letter",
                "*": "Esperanto paroli",
                "canonical": "Esperanto paroli"
            },
            "502": {
                "id": 502,
                "case": "first-letter",
                "*": "Team",
                "subpages": "",
                "canonical": "Team",
                "content": ""
            },
            "503": {
                "id": 503,
                "case": "first-letter",
                "*": "Team talk",
                "subpages": "",
                "canonical": "Team talk"
            },
            "828": {
                "id": 828,
                "case": "first-letter",
                "*": "M\u00f3dulo",
                "subpages": "",
                "canonical": "Module"
            },
            "829": {
                "id": 829,
                "case": "first-letter",
                "*": "M\u00f3dulo discusi\u00f3n",
                "subpages": "",
                "canonical": "Module talk"
            }
        }
    }
}