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",
				"*": "Medium",
				"canonical": "Media"
			},
			"-1": {
				"id": -1,
				"case": "first-letter",
				"*": "Spezial",
				"canonical": "Special"
			},
			"0": {
				"id": 0,
				"case": "first-letter",
				"*": "",
				"content": ""
			},
			"DROPTOURS_DISKUSSION": {
				"id": 0,
				"case": "first-letter",
				"*": "DropTours Diskussion",
				"canonical": "DropTours Diskussion",
				"content": ""
			},
			"1": {
				"id": 1,
				"case": "first-letter",
				"*": "Diskussion",
				"subpages": "",
				"canonical": "Talk"
			},
			"2": {
				"id": 2,
				"case": "first-letter",
				"*": "Benutzer",
				"subpages": "",
				"canonical": "User"
			},
			"3": {
				"id": 3,
				"case": "first-letter",
				"*": "Benutzer Diskussion",
				"subpages": "",
				"canonical": "User talk"
			},
			"4": {
				"id": 4,
				"case": "first-letter",
				"*": "DropNet AG - Dokumentation",
				"canonical": "Project"
			},
			"5": {
				"id": 5,
				"case": "first-letter",
				"*": "DropNet AG - Dokumentation Diskussion",
				"subpages": "",
				"canonical": "Project talk"
			},
			"6": {
				"id": 6,
				"case": "first-letter",
				"*": "Datei",
				"canonical": "File"
			},
			"7": {
				"id": 7,
				"case": "first-letter",
				"*": "Datei Diskussion",
				"subpages": "",
				"canonical": "File talk"
			},
			"8": {
				"id": 8,
				"case": "first-letter",
				"*": "MediaWiki",
				"subpages": "",
				"canonical": "MediaWiki"
			},
			"9": {
				"id": 9,
				"case": "first-letter",
				"*": "MediaWiki Diskussion",
				"subpages": "",
				"canonical": "MediaWiki talk"
			},
			"10": {
				"id": 10,
				"case": "first-letter",
				"*": "Vorlage",
				"canonical": "Template"
			},
			"11": {
				"id": 11,
				"case": "first-letter",
				"*": "Vorlage Diskussion",
				"subpages": "",
				"canonical": "Template talk"
			},
			"12": {
				"id": 12,
				"case": "first-letter",
				"*": "Hilfe",
				"canonical": "Help"
			},
			"13": {
				"id": 13,
				"case": "first-letter",
				"*": "Hilfe Diskussion",
				"subpages": "",
				"canonical": "Help talk"
			},
			"14": {
				"id": 14,
				"case": "first-letter",
				"*": "Kategorie",
				"canonical": "Category"
			},
			"15": {
				"id": 15,
				"case": "first-letter",
				"*": "Kategorie Diskussion",
				"subpages": "",
				"canonical": "Category talk"
			},
			"102": {
				"id": 102,
				"case": "first-letter",
				"*": "DropEdit",
				"canonical": "DropEdit"
			},
			"104": {
				"id": 104,
				"case": "first-letter",
				"*": "DropTours",
				"canonical": "DropTours"
			},
			"120": {
				"id": 120,
				"case": "first-letter",
				"*": "Systemadministratoren",
				"canonical": "Systemadministratoren"
			},
			"121": {
				"id": 121,
				"case": "first-letter",
				"*": "Systemadministratoren Diskussion",
				"canonical": "Systemadministratoren Diskussion"
			}
		}
	}
}