9 lines
150 B
XML
9 lines
150 B
XML
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<!DOCTYPE doc [
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<!ELEMENT doc (a, (b | c)*, d*)? >
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<!ELEMENT a EMPTY>
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<!ELEMENT b EMPTY>
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<!ELEMENT c EMPTY>
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<!ELEMENT d EMPTY>
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]>
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<doc><a/><d/></doc>
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