XForm XML calculate with relative paths

calculate_w_relative_paths.xml

<?xml version="1.0"?>
<h:html xmlns="http://www.w3.org/2002/xforms" xmlns:ev="http://www.w3.org/2001/xml-events" xmlns:h="http://www.w3.org/1999/xhtml" xmlns:jr="http://openrosa.org/javarosa" xmlns:odk="http://www.opendatakit.org/xforms" xmlns:orx="http://openrosa.org/xforms" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <h:head>
    <h:title>Paths in a calculate within a repeat are relative.</h:title>
    <model>
      <instance>
        <data id="calculate_w_relative_paths">
          <rep jr:template="">
            <crop/>
            <a/>
            <group>
              <b/>
            </group>
          </rep>
          <meta>
            <instanceID/>
          </meta>
        </data>
      </instance>
      <bind nodeset="/data/rep/crop" type="select1"/>
      <bind calculate="name =  current()/../crop " nodeset="/data/rep/a" type="string"/>
      <bind calculate="name =  current()/../../crop " nodeset="/data/rep/group/b" type="string"/>
      <bind calculate="concat('uuid:', uuid())" nodeset="/data/meta/instanceID" readonly="true()" type="string"/>
    </model>
  </h:head>
  <h:body>
    <group ref="/data/rep">
      <label></label>
      <repeat nodeset="/data/rep">
        <select1 ref="/data/rep/crop">
          <label>Select</label>
          <item>
            <label>Maize</label>
            <value>maize</value>
          </item>
          <item>
            <label>Beans</label>
            <value>beans</value>
          </item>
          <item>
            <label>Kale</label>
            <value>kale</value>
          </item>
        </select1>
        <input ref="/data/rep/a">
          <label>Verify</label>
        </input>
        <group ref="/data/rep/group">
          <input ref="/data/rep/group/b">
            <label>Verify</label>
          </input>
        </group>
      </repeat>
    </group>
  </h:body>
</h:html>