I need help modifying a value in an XML file

[MikeRatzlaff]

Hi I am trying to change a value in my Metadata.xml file (the IIS configuration file). I'm trying to use XMLstarlet to do it, so if you can help me with that then great, but if you can show me another way (like with an XSLT file or something) that would be great too - what ever work!

Here's an excerpt of the xml file:

<?xml version ="1.0"?>
<configuration xmlns="urn:microsoft-catalog:XML_Metabase_V64_0">
<MBProperty>
<IIsWebVirtualDir    Location ="/LM/W3SVC/1/ROOT/Auditor"
              AccessFlags="AccessRead | AccessScript"
              AppFriendlyName="Auditor"
              AppIsolated="2"
              AppRoot="/LM/w3svc/1/ROOT/Auditor"
              DefaultDoc="Default.htm"
              DirBrowseFlags="EnableDefaultDoc"
              DontLog="FALSE"
              Path="C:\inetpub\wwwroot\Auditor"
       >
</IIsWebVirtualDir>
<IIsWebVirtualDir    Location ="/LM/W3SVC/1/ROOT/Reporter"
              AccessFlags="AccessRead | AccessScript"
              AppFriendlyName="Bally Live Reporter Website"
              AppIsolated="2"
              AppRoot="/LM/W3SVC/1/ROOT/Reporter"
              DefaultDoc="Default.htm"
              DirBrowseFlags="EnableDefaultDoc"
              DontLog="FALSE"
              Path="C:\inetpub\wwwroot\Reporter\"
       >
</IIsWebVirtualDir>
</MBProperty>
</configuration>
 

I want to change the DefaultDoc attribute of a specific IIsWebVirtualDir element. I can identify this element by either the Location or the AppFriendlyName attribute.

This command will change all of them:

XML ed -N ns="urn:microsoft-catalog:XML_Metabase_V64_0" -u "//ns:IIsWebVirtualDir/@DefaultDoc" -v "publish.htm" test.xml

This one will change none:

XML ed -N ns="urn:microsoft-catalog:XML_Metabase_V64_0" -u "//ns:IIsWebVirtualDir[@Location="/LM/W3SVC/1/ROOT/Reporter"]/@DefaultDoc" -v "publish.htm" test.xml

Can anyone tell me what I'm doing wrong in XMLstarlet?
Can anyone show me a different way to do this?

Thanks,
Mike