Dear Red, as a follow up to my previous email, I eventually added in 2.26.174 the following initargs to defclass system, with system-FOO accessors. :long-name "Another System Definition Facility" :website-url "http://common-lisp.net/projects/asdf/" :bug-tracker-url "https://launchpad.net/asdf/" :developers-email "asdf-devel@common-lisp.net" :source-control (:git "git://common-lisp.net/projects/asdf/asdf.git") The down side is that until ASDF2 is end-of-lifed, you'll have to #+asdf3 all these things either individually or together via e.g. (eval `(defsystem ... #+asdf3 ,@'(...) ...), (defsystem ... . #.(or #+asdf3 '(...)) or some other such ugliness. The upside is that with this standardization, odds are higher that this metadata can be used to automate processing of some sort across systems. If there are more slots that you need, now is a good time to suggest them. —♯ƒ • François-René ÐVB Rideau •Reflection&Cybernethics• http://fare.tunes.org What a lot of trouble to prove in political economy that two and two make four; and if you succeed in doing so, people cry, 'It is so clear that it is boring.' Then they vote as if you had never proved anything at all. — Frederic Bastiat, "What Is Seen and What is Not Seen", 1850