Any way to load script from file?

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="5.3.013">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="5.3.013" expanded="true" name="Process">
    <process expanded="true">
      <operator activated="true" class="text:read_document" compatibility="5.3.001" expanded="true" height="60" name="Read Document" width="90" x="45" y="255">
        <parameter key="file" value="myScriptFile.txt"/>
        <parameter key="use_file_extension_as_type" value="false"/>
      </operator>
      <operator activated="true" class="text:process_documents" compatibility="5.3.001" expanded="true" height="94" name="Process Documents" width="90" x="179" y="255">
        <parameter key="create_word_vector" value="false"/>
        <parameter key="add_meta_information" value="false"/>
        <parameter key="keep_text" value="true"/>
        <process expanded="true">
          <connect from_port="document" to_port="document 1"/>
          <portSpacing port="source_document" spacing="0"/>
          <portSpacing port="sink_document 1" spacing="0"/>
          <portSpacing port="sink_document 2" spacing="0"/>
        </process>
      </operator>
      <operator activated="true" class="extract_macro" compatibility="5.3.013" expanded="true" height="60" name="Extract Macro" width="90" x="179" y="165">
        <parameter key="macro" value="myScript"/>
        <parameter key="macro_type" value="data_value"/>
        <parameter key="attribute_name" value="text"/>
        <parameter key="example_index" value="1"/>
        <list key="additional_macros"/>
      </operator>
      <operator activated="true" class="execute_script" compatibility="5.3.013" expanded="true" height="76" name="Execute Script" width="90" x="246" y="75">
        <parameter key="script" value="%{myScript}"/>
      </operator>
      <connect from_op="Read Document" from_port="output" to_op="Process Documents" to_port="documents 1"/>
      <connect from_op="Process Documents" from_port="example set" to_op="Extract Macro" to_port="example set"/>
      <connect from_op="Extract Macro" from_port="example set" to_op="Execute Script" to_port="input 1"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
    </process>
  </operator>
</process>