All versions of Serna support DITA. However, DITA usability tools, which facilitate the insertion of common DITA constructs, and reference navigation are available in the Enterprise edition and the trial version of Serna only.
You can easily navigate to the target of a reference in Serna.
Double-click the xref/related link/topicref in the Editing Window.
Right-click the xref/related link/topicref in the Editing Window or ContentMap, and select Go Reference from the context menu.

To navigate to the target of a resolved conref, right-click the element with the conref attribute in the ContentMap, and select Go Reference from the context menu.
Double-click the conref in the Editing Window.
Right-click the conref in the Editing Window or ContentMap, and select Go Reference from the context menu.