Each plug-in that contributes an Eclipse context XML file must declare an extension to org.eclipse.help.contexts in its plug-in manifest (plugin.xml file).
For example:
<extension point="org.eclipse.help.contexts"> <contexts file="dtp_contexts.xml" plugin="org.eclipse.datatools.connectivity.ui"/> </extension>
For more information about Eclipse context XML files and contributing them, see Describing and packaging context-sensitive help content in the Platform Plug-in Developer Guide.