plugin.xml

<plugin id="org.d4p.graphviz">
  <extension id="xsl.transtype-graphviz"/>

  <require plugin="org.dita4publishers.common.mapdriven"/> 
  <require plugin="org.dita-community.common.xslt"/> 
  
  <feature extension="package.support.name" value="Eliot Kimber"/>
  <feature extension="package.support.email" value="ekimber@contrext.com"/>  

  <template file="build_transtype-graphviz_template.xml"/>
  
  <template file="xsl/map2graphviz_template.xsl"/>

  <feature extension="dita.conductor.transtype.check" value="graphviz" type="txt"/>
  <feature extension="dita.conductor.target.relative" value="build.xml" type="file"/>

  <!-- New way of specifying metadata with parameters contributed by the transtype:
        https://github.com/dita-ot/dita-ot/issues/1757
   -->
  <transtype name="graphviz" extends="d4pCommons" desc="Graphical Map Visualizer (DITA 4 Publishers) - experimental">
    <param name="graphviz.dot.executable"
      desc="File path to the Graphviz dot executable.
      e.g. &quot;C:\\Program Files (x86)\\Graphviz2.32\\bin\\dot.exe&quot;."
      type="file"/>
  </transtype>
</plugin>