9 lines
154 B
XML
9 lines
154 B
XML
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<!DOCTYPE doc [
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<!ENTITY e1 "&e2;">
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<!ENTITY e2 "&e3;">
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<!ENTITY e3 "&e1;">
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<!ELEMENT doc (#PCDATA)>
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<!ATTLIST doc a CDATA "&e1;">
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]>
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<doc></doc>
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