    private function getElementCategory($node) {
        $name = $node->tagName;
        if(in_array($name, $this->special))
            return self::SPECIAL;

        elseif(in_array($name, $this->scoping))
            return self::SCOPING;

        elseif(in_array($name, $this->formatting))
            return self::FORMATTING;

        else
            return self::PHRASING;
    }
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.