I don't know much lisp and Emacs completion framework details, but if you
use company-mode there's a nice article explaining how to create a new
company backend
http://sixty-north.com/blog/writing-the-simplest-emacs-company-mode-backend

There's also a second part improving the backend with extra information.

--
Darlan

Em qui, 16 de jul de 2015 23:52, Matt Price <moptop99@gmail.com> escreveu:

> Hi,
>
> I am thinking of turning my marking stuff into a minor mode (
> http://matt.hackinghistory.ca/2015/07/15/mailing-subtrees-with-attachments/).
> One feature that is missing from my current setup is a function that will
> let me use org-contacts-complete-name to complete names when I'm in certain
> headlines (level 2).  Does anyone know how to do that?  I don't understand
> the completion framework in emacs, looks so complicated...
>
> Thanks as always,
> m
>