title: Need help in understanding xsl import statement from DITA-OT xsl
body: <p>The statement is as follows: </p>
  
  <pre><code>&lt;xsl:import href="plugin:org.dita.xhtml:xsl/dita2html-base.xsl"/&gt;
  </code></pre>
  
  <p>I am new to XSL. I know the href attribute requires a URI but how does the href value resolve to a URI in the above statement. This code is part of the xhtml plugin's xsl in the DITA-OT. There are multiple statements like these. Are these relative paths from a root directory ? How does the DITA-OT code resolve these paths ?</p>