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<!DOCTYPE exa [
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<!ENTITY q "quote sign">
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<!ENTITY int "internal entity">
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<!ENTITY ext SYSTEM "ext.ent">
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<!ATTLIST a x NMTOKENS #IMPLIED
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y CDATA #IMPLIED>
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]>
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<a x=" a b " y="two &q;s: ' and "">
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here is a character reference: @
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here is an ∫
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here is an &ext;
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</a>
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