"rename attributes in loop"

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="6.0.009">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="6.0.009" expanded="true" name="Process">
    <process expanded="true">
      <operator activated="true" class="retrieve" compatibility="6.0.009" expanded="true" height="60" name="Retrieve Iris" width="90" x="45" y="30">
        <parameter key="repository_entry" value="//Samples/data/Iris"/>
      </operator>
      <operator activated="true" class="loop_attributes" compatibility="6.0.009" expanded="true" height="76" name="Loop Attributes" width="90" x="179" y="30">
        <process expanded="true">
          <operator activated="true" class="generate_macro" compatibility="6.0.009" expanded="true" height="76" name="Generate Macro" width="90" x="45" y="30">
            <list key="function_descriptions">
              <parameter key="name" value="concat(&quot;%{loop_attribute}&quot;, &quot;_0&quot;)"/>
            </list>
          </operator>
          <operator activated="true" class="rename" compatibility="6.0.009" expanded="true" height="76" name="Rename" width="90" x="246" y="30">
            <parameter key="old_name" value="%{loop_attribute}"/>
            <parameter key="new_name" value="%{name}"/>
            <list key="rename_additional_attributes"/>
          </operator>
          <connect from_port="example set" to_op="Generate Macro" to_port="through 1"/>
          <connect from_op="Generate Macro" from_port="through 1" to_op="Rename" to_port="example set input"/>
          <connect from_op="Rename" from_port="example set output" to_port="example set"/>
          <portSpacing port="source_example set" spacing="0"/>
          <portSpacing port="sink_example set" spacing="0"/>
          <portSpacing port="sink_result 1" spacing="0"/>
        </process>
      </operator>
      <connect from_op="Retrieve Iris" from_port="output" to_op="Loop Attributes" to_port="example set"/>
      <connect from_op="Loop Attributes" from_port="example set" to_port="result 1"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
      <portSpacing port="sink_result 2" spacing="0"/>
    </process>
  </operator>
</process>