src/third_party/web_platform_tests/resources/webidl2/test/widlproc/test/valid/xml/nullable.widlprocxml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
<Definitions>
  <webidl>interface MyConstants {
  const boolean? ARE_WE_THERE_YET = false;
};

interface Node {
  readonly attribute DOMString? namespaceURI;
};</webidl>
  <Interface name="MyConstants" id="::MyConstants">
    <webidl>interface MyConstants {
  const boolean? ARE_WE_THERE_YET = false;
};</webidl>
    <Const name="ARE_WE_THERE_YET" value="false" id="::MyConstants::ARE_WE_THERE_YET">
      <webidl>  const boolean? ARE_WE_THERE_YET = false;</webidl>
      <Type type="boolean" nullable="nullable"/>
    </Const>
  </Interface>
  <Interface name="Node" id="::Node">
    <webidl>interface Node {
  readonly attribute DOMString? namespaceURI;
};</webidl>
    <Attribute readonly="readonly" name="namespaceURI" id="::Node::namespaceURI">
      <webidl>  readonly attribute DOMString? namespaceURI;</webidl>
      <Type type="DOMString" nullable="nullable"/>
    </Attribute>
  </Interface>
</Definitions>