As part of a recent effort to update the KnowRob documentation, we have included auto-generated API documentation into the KnowRob wiki and increased the documentation coverage to all exported predicates of all modules in the core KnowRob stack and several packages in knowrob_addons and knowrob_dev.
The documentation is generated automatically from structured comments in the source code using the pldoc system, similar to the well-known javadoc or doxygen systems. It is re-generated at every commit by our Jenkins server.
By the way, KnowRob includes a wrapper for pldoc that facilitates the generation of API documentation for KnowRob packages. You can call it for the existing packages or your own packages using
rosrun rosprolog rosprolog-doc <pkgname>