public static boolean isXML11Space(int c) {
        return (c < 0x10000 && (XML11CHARS[c] & MASK_XML11_SPACE) != 0);
    }
Returns true if the specified character is a space character
as amdended in the XML 1.1 specification.

@param c The character to check.
stroom-util/src/main/java/stroom/util/xml/XML11Char.java