I just want to let you know that I am in talks with the legal people at IBM regarding the release of (parts of) the APL2 reference documentation under an open source license.
If this comes to fruition it will make it possible to integrate the text from this document in not onlu the Emacs mode but also GNU APL proper.
I have been promised a reply by the end of January. I will keep you posted.
Regards,
Elias