XML support libxml

I have an application for xml parsing on a Net +50. I am using netos 5.0. I have netos 6 but we have not ported from 5 yet. I have seen promotional literature from Netsilicon claiming xml support but I cannot find any documentation on it? Is it supported and where? Where is it documented. I searched the 5.0 and 6.0 API docs and can’t find a reference to an xml parser only and xml data type for the http .