SCViewer/plugins/com.minres.scviewer.e4.application.help/plugin.xml

<?xml version="1.0" encoding="utf-8" standalone="no"?>
<plugin>
   <extension point="org.eclipse.help.toc">
      <toc file="toc.xml" primary="true"/>
   </extension>
   <extension point="org.eclipse.help.index">
      <index file="index.xml"/>
   </extension>
</plugin>