<?xml version="1.0" encoding="UTF-8"?>
<document>
  <metadata>
    <title>Sample XML Document</title>
    <author>Test Author</author>
    <version>1.0</version>
  </metadata>
  <sections>
    <section id="1" type="intro">
      <heading>Introduction</heading>
      <paragraph>This is a sample XML document for testing.</paragraph>
    </section>
    <section id="2" type="content">
      <heading>Multilingual Content</heading>
      <paragraph lang="ko">한국어 텍스트</paragraph>
      <paragraph lang="zh">中文文本</paragraph>
      <paragraph lang="ja">日本語テキスト</paragraph>
      <paragraph lang="emoji">🚀 Rocket launch! ✨🌍</paragraph>
    </section>
    <section id="3" type="data">
      <heading>Data Section</heading>
      <items>
        <item priority="high">First item</item>
        <item priority="low">Second item</item>
      </items>
      <!-- This is a comment -->
      <separator/>
    </section>
  </sections>
</document>
