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<body>

<h2>Summary</h2>

<p>
Apache Derby is a standards-based, pure-Java relational database engine.
Its easy-to-use data manager requires no administration by end users.
Derby runs on any JVM at Java version 9 or higher and Derby supports JDBC
  version 4.3.
Derby's platform-independent database format may be copied to
any file system.
</p>

<p>
Apache Derby is a subproject of the Apache DB project,
licensed under the Apache License, Version 2.0, which you may obtain
from <a href="https://www.apache.org/licenses/LICENSE-2.0">https://www.apache.org/licenses/LICENSE-2.0</a>
You may find Derby on the web at <a href="https://db.apache.org/derby/">https://db.apache.org/derby/</a>.
You may download Apache Derby releases from <a href="https://db.apache.org/derby/derby_downloads.html">https://db.apache.org/derby/derby_downloads.html</a>.
</p>

<p>
Information on Derby configurations follows.
</p>

<h2>Derby Configurations</h2>

<p>
Derby's modules may be wired together in several configurations. The
modules are:
</p>

<table border="1">
  <thead>
    <tr>
     <th>Module name</th>
     <th>Jar file</th>
     <th>Description</th>
    </tr>
  </thead>

  <tbody>

    <tr>
      <td>org.apache.derby.engine</td>
      <td>derby.jar</td>
      <td>The embedded database engine contains Derby's core
      functionality. It contains its own JDBC driver, allowing
      one JVM to host both Derby and the applications which use it.</td>
    </tr>
    
    <tr>
      <td>org.apache.derby.server</td>
      <td>derbynet.jar</td>
      <td>The network server wraps the database engine, enabling
      networked JDBC access.</td>
    </tr>
    
    <tr>
      <td>org.apache.derby.client</td>
      <td>derbyclient.jar</td>
      <td>The remote JDBC client connects to a server across a
      network.</td>
    </tr>
    
    <tr>
      <td>org.apache.derby.tools</td>
      <td>derbytools.jar</td>
      <td>Basic tools include a schema dumper and an interactive SQL interpreter.</td>
    </tr>
    
    <tr>
      <td>org.apache.derby.optionaltools</td>
      <td>derbyoptionaltools.jar</td>
      <td>Optional tools support metadata introspection and access to
      other vendors' databases.</td>
    </tr>
    
    <tr>
      <td>org.apache.derby.runner</td>
      <td>derbyrun.jar</td>
      <td>The runner module supports easy command-line administration
      of Derby installations.</td>
    </tr>
    
    <tr>
      <td>org.apache.derby.commons</td>
      <td>derbyshared.jar</td>
      <td>The commons module contains cross-module support utilities.</td>
    </tr>
    
    <tr>
      <td>org.apache.derby.locale_*</td>
      <td>derbyLocale_*.jar</td>
      <td>Message localizations support human-readable diagnostics
      in languages other than English.</td>
    </tr>
    
    <tr>
      <td>org.apache.derby.tests</td>
      <td>derbyTests.jar</td>
      <td>An extensive body of tests stresses functionality in all of
      the other modules.</td>
    </tr>
    
  </tbody>
  
</table>

<p>
The following conventions apply to the module diagrams presented here:
</p>

<ul>
<li>Derby modules appear in <b><font color="blue">blue</font></b>.</li>
<li>JVM modules appear in <b><font color="black">black</font></b>.</li>
<li>3rd party modules appear in <b><font color="pink">pink</font></b>.</li>
<li>Optional modules appear in <b><font color="gray">gray</font></b>.</li>
</ul>

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