You are looking at the HTML representation of the RAW format.
HTML is good for debugging, but probably is not suitable for your application.
Please see "format" parameter documentation at the API help for more information.
{
	"query": {
		"namespaces": {
			"-2": {
				"id": -2,
				"*": "Media"
			},
			"-1": {
				"id": -1,
				"*": "Special"
			},
			"0": {
				"id": 0,
				"*": ""
			},
			"1": {
				"id": 1,
				"*": "Discuter"
			},
			"2": {
				"id": 2,
				"*": "Utilisateur"
			},
			"3": {
				"id": 3,
				"*": "Discussion Utilisateur"
			},
			"4": {
				"id": 4,
				"*": "Wiki-evr@"
			},
			"5": {
				"id": 5,
				"*": "Discussion Wiki-evr@"
			},
			"6": {
				"id": 6,
				"*": "Image"
			},
			"7": {
				"id": 7,
				"*": "Discussion Image"
			},
			"8": {
				"id": 8,
				"*": "MediaWiki"
			},
			"9": {
				"id": 9,
				"*": "Discussion MediaWiki"
			},
			"10": {
				"id": 10,
				"*": "Mod\u00e8le"
			},
			"11": {
				"id": 11,
				"*": "Discussion Mod\u00e8le"
			},
			"12": {
				"id": 12,
				"*": "Aide"
			},
			"13": {
				"id": 13,
				"*": "Discussion Aide"
			},
			"14": {
				"id": 14,
				"*": "Cat\u00e9gorie"
			},
			"15": {
				"id": 15,
				"*": "Discussion Cat\u00e9gorie"
			},
			"100": {
				"id": 100,
				"*": "Bibtex"
			},
			"_element": "ns"
		}
	}
}