filter

var DropChar rune = -1

DropChar is simple negative value to indicate removing a char from a RuneMap

var SpaceChar rune = 0x20

SpaceChar is a code for a simple space

var XML10Charset = func(r rune) (inrange bool) {
	return r == 0x09 ||
		r == 0x0A ||
		r == 0x0D ||
		r >= 0x20 && r <= 0xDF77 ||
		r >= 0xE000 && r <= 0xFFFD ||
		r >= 0x10000 && r <= 0x10FFFF
}

IsInCharacterXML10 Decides whether the given rune is in the XML Character Range, per the Char production of http://www.xml.com/axml/testaxml.htm, Section 2.2 Characters. (lifted from https://golang.org/src/encoding/xml/xml.go)