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<?xml version="1.0" encoding="UTF-8"?>
<document>
  <header>
    <title>Technical Documentation</title>
    <metadata>
      <author>John Smith</author>
      <date>2025-03-10</date>
      <version>1.2.3</version>
    </metadata>
  </header>
  
  <section id="introduction">
    <title>Introduction</title>
    <p>This document provides technical specifications and usage guidelines for the XYZ system. The information contained herein is designed for system administrators and technical staff.</p>
    <p>Please review all sections carefully before implementation.</p>
  </section>
  
  <section id="system-overview">
    <h1>System Overview</h1>
    <p>The XYZ system consists of multiple interconnected components that work together to provide a comprehensive solution.</p>
    
    <subsection id="architecture">
      <h2>Architecture</h2>
      <p>The system follows a three-tier architecture with the following layers:</p>
      <ul>
        <li>Presentation Layer</li>
        <li>Business Logic Layer</li>
        <li>Data Access Layer</li>
      </ul>
    </subsection>
    
    <subsection id="components">
      <h2>Key Components</h2>
      <p>The system includes the following key components:</p>
      <table>
        <tr>
          <th>Component</th>
          <th>Description</th>
          <th>Version</th>
        </tr>
        <tr>
          <td>Authentication Service</td>
          <td>Handles user authentication and authorization</td>
          <td>2.1.0</td>
        </tr>
        <tr>
          <td>Data Processing Engine</td>
          <td>Processes incoming data streams</td>
          <td>3.5.2</td>
        </tr>
        <tr>
          <td>Reporting Module</td>
          <td>Generates system reports and analytics</td>
          <td>1.7.4</td>
        </tr>
      </table>
    </subsection>
  </section>
  
  <section id="installation" title="Installation Guide">
    <p>Follow these steps to install the XYZ system on your server infrastructure.</p>
    
    <div class="prerequisites">
      <heading>Prerequisites</heading>
      <p>Before installation, ensure your system meets the following requirements:</p>
      <ul>
        <li>Operating System: Linux (Ubuntu 20.04 or higher)</li>
        <li>Memory: 16GB RAM minimum</li>
        <li>Storage: 100GB available disk space</li>
        <li>Network: 1Gbps Ethernet connection</li>
      </ul>
    </div>
    
    <div class="installation-steps">
      <h2>Installation Steps</h2>
      <ol>
        <li>Download the installation package from the provided URL</li>
        <li>Extract the package to your preferred location</li>
        <li>Run the setup script with administrator privileges</li>
        <li>Follow the on-screen prompts to complete the installation</li>
      </ol>
    </div>
    
    <table class="compatibility-table">
      <thead>
        <tr>
          <th>Browser</th>
          <th>Minimum Version</th>
          <th>Recommended Version</th>
        </tr>
      </thead>
      <tbody>
        <tr>
          <td>Chrome</td>
          <td>88</td>
          <td>100+</td>
        </tr>
        <tr>
          <td>Firefox</td>
          <td>90</td>
          <td>98+</td>
        </tr>
        <tr>
          <td>Safari</td>
          <td>14</td>
          <td>15+</td>
        </tr>
      </tbody>
    </table>
  </section>
  
  <section id="configuration">
    <h1>System Configuration</h1>
    <p>This section covers the configuration options available in the XYZ system.</p>
    
    <subsection id="config-files">
      <h2>Configuration Files</h2>
      <p>The system uses the following configuration files:</p>
      <table>
        <tr>
          <th>File</th>
          <th>Purpose</th>
          <th>Location</th>
        </tr>
        <tr>
          <td>main.conf</td>
          <td>Primary system configuration</td>
          <td>/etc/xyz/</td>
        </tr>
        <tr>
          <td>network.conf</td>
          <td>Network settings</td>
          <td>/etc/xyz/network/</td>
        </tr>
        <tr>
          <td>users.conf</td>
          <td>User management settings</td>
          <td>/etc/xyz/users/</td>
        </tr>
      </table>
    </subsection>
    
    <subsection id="environment-variables">
      <h2>Environment Variables</h2>
      <p>The following environment variables can be used to override default settings:</p>
      <table>
        <tr>
          <th>Variable</th>
          <th>Description</th>
          <th>Default Value</th>
        </tr>
        <tr>
          <td>XYZ_HOME</td>
          <td>Installation directory</td>
          <td>/opt/xyz</td>
        </tr>
        <tr>
          <td>XYZ_LOG_LEVEL</td>
          <td>Logging verbosity</td>
          <td>INFO</td>
        </tr>
        <tr>
          <td>XYZ_PORT</td>
          <td>Service port</td>
          <td>8080</td>
        </tr>
      </table>
    </subsection>
  </section>
  
  <div class="content-section">
    <heading>Performance Tuning</heading>
    <p>This section provides guidance on optimizing system performance.</p>
    
    <div class="performance-table-container">
      <table class="performance-metrics">
        <tr>
          <th>Setting</th>
          <th>Low Traffic</th>
          <th>Medium Traffic</th>
          <th>High Traffic</th>
        </tr>
        <tr>
          <td>Connection Pool Size</td>
          <td>10</td>
          <td>50</td>
          <td>200</td>
        </tr>
        <tr>
          <td>Cache Size (MB)</td>
          <td>256</td>
          <td>1024</td>
          <td>4096</td>
        </tr>
        <tr>
          <td>Worker Threads</td>
          <td>5</td>
          <td>20</td>
          <td>50</td>
        </tr>
      </table>
    </div>
  </div>
  
  <section id="troubleshooting">
    <h1>Troubleshooting</h1>
    <p>Common issues and their solutions are documented in this section.</p>
    
    <subsection id="common-errors">
      <h2>Common Errors</h2>
      <table>
        <tr>
          <th>Error Code</th>
          <th>Description</th>
          <th>Resolution</th>
        </tr>
        <tr>
          <td>ERR-1001</td>
          <td>Database connection failure</td>
          <td>Check database credentials and network connectivity</td>
        </tr>
        <tr>
          <td>ERR-2002</td>
          <td>Authentication service unavailable</td>
          <td>Restart the authentication service</td>
        </tr>
        <tr>
          <td>ERR-3003</td>
          <td>Insufficient disk space</td>
          <td>Free up disk space or add storage</td>
        </tr>
      </table>
    </subsection>
    
    <div class="logging">
      <h2>Log Files</h2>
      <p>The system generates the following log files:</p>
      <ul>
        <li>system.log - General system events</li>
        <li>error.log - Error messages and exceptions</li>
        <li>access.log - User access attempts</li>
        <li>performance.log - Performance metrics</li>
      </ul>
    </div>
  </section>
  
  <appendix id="appendix-a">
    <title>Appendix A: API Reference</title>
    <p>This appendix provides detailed information about the system's API endpoints.</p>
    
    <table>
      <tr>
        <th>Endpoint</th>
        <th>Method</th>
        <th>Description</th>
      </tr>
      <tr>
        <td>/api/users</td>
        <td>GET</td>
        <td>Retrieve list of users</td>
      </tr>
      <tr>
        <td>/api/users/{id}</td>
        <td>GET</td>
        <td>Retrieve specific user</td>
      </tr>
      <tr>
        <td>/api/reports</td>
        <td>POST</td>
        <td>Generate new report</td>
      </tr>
    </table>
  </appendix>
  
  <footer>
    <copyright>Copyright © 2025 XYZ Corporation. All rights reserved.</copyright>
    <contact>
      <email>support@example.com</email>
      <phone>+1-555-123-4567</phone>
    </contact>
  </footer>
</document>