11 lines
180 B
XML
11 lines
180 B
XML
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<!DOCTYPE doc
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[
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<!ELEMENT doc ANY>
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<!ELEMENT a (doc,a?)>
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<!ELEMENT b (doc|a)>
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<!ELEMENT c (a,b)?>
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<!ELEMENT d (a|b)? >
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<!ELEMENT e (a,b)* >
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<!ELEMENT f (a,b)+ >
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]>
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<doc/>
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