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9 lines
207 B
XML
9 lines
207 B
XML
<?xml version="1.0"?>
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<!DOCTYPE a [
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<!ELEMENT a (#PCDATA | b | c)*>
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<!ELEMENT b (#PCDATA)>
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<!ELEMENT c (#PCDATA)>
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<!ELEMENT a (#PCDATA | b | c)*>
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]>
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<a> violates [ VC: Unique Element Type Declaration ] </a>
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