The issue domain is the tool domain for all issue tracking tools, like Jira, Trac or Mantis.
The issue Domain provides the possibility to create, update, delete and comment issues.
Link to the Java Domain Interface on Github. This interface also contains information about events raised by this domain.
The Trac Connector is a issue tool connector for the Trac project management and issue tracker system.
The external Trac tool has to be accessible via XmlRpc. For this purpose the XmlRpcPlugin has to be installed (see http://trac.edgewall.org/wiki/PluginList).
The Jira Connector is an issue connector for the Jira issue and project tracking system.
The Jira connector should work with a default Jira installation. However, make sure that the RPC plugin is enabled as described in the Jira XML-RPC Overview.