Math Overflow has a cite button on answers, generating something like this:
\bib{MO63167}{misc}{
title={Decomposing a discrete signal into a sum of rectangle functions},
author={Gabriel (mathoverflow.net/users/13825)},
note={URL: http://mathoverflow.net/questions/63167 (version: 2011-04-27)},
eprint={http://mathoverflow.net/questions/63167},
organization={MathOverflow},
}
Our version of that could be something like
[1] [Unity keyboard/mouse shortcuts](httphttps://askubuntu.com/questions/28086) —
[Jorge Castro on Ask Ubuntu](httphttps://askubuntu.com/users/235/).
[1] Unity keyboard/mouse shortcutsUnity keyboard/mouse shortcuts — Jorge Castro on Ask UbuntuJorge Castro on Ask Ubuntu.
It's short and fulfills all four recommendations.
Optionally, one may want to include a date:
[1] [Unity keyboard/mouse shortcuts](httphttps://askubuntu.com/questions/28086) —
[Jorge Castro on Ask Ubuntu](httphttps://askubuntu.com/users/235/),
retrieved [Apr 12 at 14:18](httphttps://askubuntu.com/posts/28087/revisions).
[1] Unity keyboard/mouse shortcutsUnity keyboard/mouse shortcuts — Jorge Castro on Ask UbuntuJorge Castro on Ask Ubuntu, retrieved Apr 12 at 14:18Apr 12 at 14:18.
We could either add a [cite] button to questions, like Math Overflow do, or (since that's a bit extreme in my view), have a topic on meta - "How do I cite content".
What do we think?