15 lines
196 B
XML
15 lines
196 B
XML
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<!DOCTYPE doc
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[
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<!ELEMENT doc ANY>
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<!--NOTE: XML doesn't specify whether this is a choice or a seq-->
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<!ELEMENT a (doc?)>
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<!ELEMENT b (doc|a)>
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<!ELEMENT c (
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doc
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a
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c?
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)>
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]>
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<doc/>
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