Hi;

First off, I think I still do not understand exactly how we are supposed to
handle namespaces when doing xpath queries under .NET so I may have some bad
assumptions here.

As I understand it, we need to set the namespaces on an XmlDocument - the
.NET libraries do not read it from the xmlns:... attributes in the xml.

In our case we have to handle xml our customers will pass to our library so
we do not know up front what namespaces will be in there or how they are set
up. So we do the following:

    private void SetNamespace(XPathNavigator nav)
    {

        XPathNodeIterator list = nav.Select("//namespace::*[name() !=
'xml'][not(../../namespace::*=.)]");
        while (list.MoveNext())
        {
            XPathNavigator nsNode = list.get_Current();
            if (nsNode.get_NodeType() == XPathNodeType.Namespace)
            {
                if (context == null)
                    context = new XmlNamespaceManager(nav.get_NameTable());
                if (nsNode.get_LocalName().equals(""))
                    context.AddNamespace(String.Empty, nsNode.get_Value());
                else
                    context.AddNamespace(nsNode.get_LocalName(), nsNode.get_Value());
            }
        }
    }

But this appears to not work for xml in the form:
<DaType Version="60.46.0.306">
 <DaCustomer>
   <Customer xmlns:i="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://ibs.entriq.net/Customers">
     <BirthDate>0001-01-01T00:00:00</BirthDate>
     <BusinessUnitId>0</BusinessUnitId>
     <ClassId>1</ClassId>
     <CustomFields xmlns:d2p1="http://ibs.entriq.net/Core">
       <d2p1:CustomFieldValue>
         <d2p1:Extended i:nil="true" />
...

I assume because the d2p1 namespace applies to only part of the xml.

How should we handle this - especially as a single xpath can reference nodes
both inside CustomFields and outside it sp on a single xpath d2p1 has meaning
on some nodes and no meaning on others.