[Xsltforms-support] Unable to reference a selected element in inputs

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I am trying to create an editor for an xml file that has a very specific 
format that has a series of <video>s, all with the same format. To do 
this I am using <select1> to choose which <video> to change, and then 
several <input>s that represent the fields within that <video>. I can't 
figure out how to get the <input>s to match the selected <video>. Here 
is the source:

<?xml version="1.0" encoding="utf-8" ?>
<?xml-stylesheet href="scripts/xsltforms/xsltforms.xsl" type="text/xsl" ?>
<?xsltforms-options debug="yes"?>

<html xmlns="http://www.w3.org/1999/xhtml" 
xmlns:xf="http://www.w3.org/2002/xforms"
     xmlns:xs="http://www.w3.org/2001/XMLSchema">
<head>
<title>Search</title>
<xf:model id="control">
<xf:instance>
<control xmlns="">
<current />
</control>
</xf:instance>
</xf:model>

<xf:model id="document">
<xf:instance>
<videos xmlns="http://www.example.org/videos" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                     xsi:schemaLocation="http://www.example.org/videos 
videos.xsd" id="videos">
<video name="Magnifica">
<description>
<![CDATA[Don't be an arrogant jerk. Try Magnifica today!]]>
</description>
<furl>http://www.facebook.com/video/video.php?v=610610255477
</furl>
<yurl>http://www.youtube.com/watch?v=X6--U2p7fnE
</yurl>
</video>
<!-- more <video>s follow -->
</videos>
</xf:instance>
</xf:model>

</head>
<body>
<xf:input ref="video[2]@name" model="document">
<xf:label>name</xf:label>
</xf:input>

<!--other <input>s follow-->

<xf:select1 model="control" ref="current">
<xf:label>Current Video:</xf:label>
<xf:itemset model="document" nodeset="video">
<xf:label ref="@name" />
<xf:value ref="@name" />
</xf:itemset>
</xf:select1>
</body>
</html>

The xml that is being edited is the document <model>. According to the 
W3C specification, using <copy> instead of <value> inside the <itemset> 
and then referencing control/current should work, but I get an error 
(shown below). I am open to slight modifications in the formats if it 
will get the job done.

XSLTForms Exception
--------------------------

Error initializing :

TypeError

this.valueBinding is undefined