public XPathAxisIterator(XPathAxisIterator it) {
     this.nav       = it.nav.Clone();
     this.type      = it.type;
     this.name      = it.name;
     this.uri       = it.uri;
     this.position  = it.position;
     this.matchSelf = it.matchSelf;
     this.first     = it.first;
 }
		public XPathAxisIterator(XPathAxisIterator copy)
			: base(copy)
		{
			iterator = (XPathSimpleIterator) (copy.iterator.Clone());
			test = copy.test;
			pos = copy.pos;
		}