@Override
    public void startElement(String ns, String arg1, String arg2,
            Attributes attributes) throws SAXException {
        if ("http://www.w3.org/1999/xhtml" == ns
                || "http://www.w3.org/2000/svg" == ns
                || "http://www.w3.org/1998/Math/MathML" == ns) {
            delegate.startElement(ns, arg1, arg2, filterAttributes(attributes));
        } else {
            delegate.startElement(ns, arg1, arg2, attributes);
        }
    }
@param ns
@param arg1
@param arg2
@param attributes
@throws SAXException
@see org.xml.sax.ContentHandler#startElement(java.lang.String,
     java.lang.String, java.lang.String, org.xml.sax.Attributes)
src/nu/validator/xml/ariaattributes/AriaAttributeDroppingContentHandlerWrapper.java