Database file format used by IN-HEH Timeline, a program for creating historical databases; may include events, people, locations, and genealogical information; can be viewed as a hierarchical list or in a graphical format using the IN-HEH program.
Program(s) that open ihx files
Windows: IN-HEH Timeline
Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/ihx
