Splitting large Scriptella ETL files (See related posts)

<!DOCTYPE etl SYSTEM "http://scriptella.javaforge.com/dtd/etl.dtd"
[
    <!-- Declaring the first external parsed entity to include -->
    <!ENTITY part1 SYSTEM "part1.xml">
    
    <!-- Declaring the second external parsed entity to include -->
    <!ENTITY part2 SYSTEM "part2.xml">
]>
<etl>
    <connection driver="text"/>

    <!-- Including file #1 -->
    &part1;

    <script>
        content of the script
    </script>
    
    <!-- Including file #2 -->
    &part2;

</etl>