SortMerge doesn't work in V2.0 with dataless master view
As reported in http://www.javadesktop.org/forums/thread.jspa?threadID=469&tstart=0 javax.help.SortMerge doesn't work if there is a dataless master view or if the data in the master view doesn't contain any real data (TOCItem or IndexItem).
A bug (4923782) has been filed and fixed. The fix will be in the next release of JavaHelp (most likely 2.0.1). In the meantime the workaround is to create data for the master view instead of using a data less view.