This is an intermediate parent POM between the jcore-base parent and the components belonging to the
Jena Document Information (JeDIS) infrastructure. This POM determines the version of CoStoSys to use.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window jedis-parent-2.6.2.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.