<?xml encoding="UTF-8"?>

<!-- Sample query #1: /A/B/D	prefer QE plan -->
<!-- Sample query #2: //B/D	prefer SE plan (//B) + QE plan (B/D) -->
<!-- Sample query #3: /A/B/D//F	prefer QE plan (/A/B/D) + SE plan (D//F) -->

<!ELEMENT A (B)>
<!ELEMENT B (C+, D)>
<!ELEMENT C (D+)>
<!ELEMENT D (#PCDATA | E)*>
<!ELEMENT E (F, G+)>
<!ELEMENT F (#PCDATA)>
<!ELEMENT G (#PCDATA)>