 or more of these functions using one of the associated libraries:</p>

<ul>
  <li>login &amp; manage sessions (<a href="#authentication">Authentication Libraries</a>)</li>
  <li>parse &amp; query linked data  (<a href="#linked_data">Linked Data Libraries</a>)</li>
  <li>manage documents and information flow (<a href="#resource">Resource Management Libraries</a>)</li>
  <li>provide a user interface (<a href="#interface">Interface Libraries</a>)</li>
</ul>

<p>Beginning developers may want to start with one 