<!-- copyField commands -->
<copyField source="author" dest="author_exact"/>
<copyField source="subject" dest="subject_exact"/>
<copyField source="medium" dest="medium_exact"/>
<copyField source="journal-title" dest="journal-title_exact"/>
<!-- copyField commands -->
<copyField source="author" dest="author_exact"/>
<copyField source="subject" dest="subject_exact"/>
<copyField source="medium" dest="medium_exact"/>
<copyField source="journal-title" dest="journal-title_exact"/>