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<?xml encoding='US-ASCII'?>
<!ELEMENT sxe (elem1+, elem11, elem22*)>
<!ATTLIST sxe id CDATA #implied>
<!ELEMENT elem1 elem2*>
<!ATTLIST elem1 attr1 CDATA #required
attr2 CDATA "default>
<!ELEMENT elem2 elem3*>
<!ATTLIST elem2 att25 CDATA #implied
att42 CDATA #implied>
<!ELEMENT elem3 elem4*>
<!ATTLIST elem3>
<!ELEMENT elem4 EMPTY>
<!ATTLIST elem4>
<!ELEMENT elem11 elem111*>
<!ATTLIST elem11>
<!ELEMNET elem111 elem1111*>
<!ATTLIST elem111>
<!ELEMENT elem1111 EMPTY>
<!ATTLIST elem1111>
<!ELEMENT elem22 elem222*>
<!ATTLIST elem22 attr22 CDATA #implied>
<!ELEMENT elem222 EMPTY>
<!ATTLIST elem222>
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