1	end of file
2	null character
3	space
4	PCData
5	CData
6	quoted characters
7	=
8	<
9	</
10	<?
11	<!--
12	<!
13	<![CDATA[
14	/>
15	>
16	?>
17	-->
18	name
19	/
20	?
50	SYSTEM or PUBLIC
51	PubIDChar, or quote
52	quote
53	legal character
54	recognized character encoding
55	<, </, <!--, &, or character data
56	DEFAULT or PRESERVE
57	entity
58	illegal UTF-8 character sequence