A user posted [https://groups.google.com/forum/#!topic/ddf-developers/uxJK_AjZLE0|this message] in the developer's group about the fact that our documentation specifies JDK 8 as an installation requirement for DDF. That should only be the case if the installation is going to be used for development - building DDF, new bundles, etc. - and not for a runtime system.
There is one other place in which we recommend the presence/use of the JDK: on Windows systems we explicitly suggest that installers use the jar exec to unzip DDF because the native zip utility truncates long paths. We should clarify that section to indicate that iff a JDK is installed, the jar command may be used; otherwise, another archiving utility that does not have issue with long paths should be installed. I would say it is acceptable to leave it as an exercise to the user to figure out what unzip utilities work correctly on Windows.