Internet Explorer has a default, built-in style sheet that displays the XML source as a (collapsible|expandable) tree.
1	Internet	Internet	PROPN	SG-NOM	Case=Nom	3	nsubj	_	_
2	Explorer	Explorer	PROPN	SG-NOM	Number=Sing	1	flat	_	_
3	has	have	VERB	PRES	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	a	a	DET	IND-SG	Definite=Ind|PronType=Art	5	det	_	_
5	default	default	NOUN	SG-NOM	Number=Sing	9	compound	_	SpaceAfter=No
6	,	,	PUNCT	Comma	_	5	punct	_	_
7	built-in	built-in	ADJ	POS	Degree=Pos	9	amod	_	_
8	style	style	NOUN	SG-NOM	Number=Sing	9	compound	_	_
9	sheet	sheet	NOUN	SG-NOM	Number=Sing	3	obj	_	_
10	that	that	PRON	REL	PronType=Rel	11	nsubj	_	_
11	displays	display	VERB	PRES	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	acl:relcl	_	_
12	the	the	DET	DEF	Definite=Def|PronType=Art	14	det	_	_
13	XML	Xml	PROPN	SG-NOM	Number=Sing	14	compound	_	_
14	source	source	NOUN	SG-NOM	Number=Sing	11	obj	_	_
15	as	as	ADP	_	_	18	case	_	_
16	a	a	DET	IND-SG	Definite=Ind|PronType=Art	18	det	_	_
17	(collapsible|expandable)	(collapsible|expandable)	ADJ	POS	Degree=Pos	18	amod	_	_
18	tree	tree	NOUN	SG-NOM	Number=Sing	11	obl	_	SpaceAfter=No
19	.	.	PUNCT	Period	_	3	punct	_	_
