/rhino/xmlimplsrc/org/mozilla/javascript/xmlimpl/XMLName.java
return c || '_';
return c == '_';
if (c >= 'a') { return c <= 'z'; } else if (c >= 'A') { if (c <= 'Z') { return true; } <extra_id_0> } } else if ((c & ~0x1FFF) == 0) { return (0xC0 <= c && c <= 0xD6) || (0xD8 <= c && c <= 0xF6) || (0xF8 <= c && c <= 0x2FF) || (0x370 <= c && c <= 0x37D)