Why does the key binding list say "Prefix Command"?

[Lennart Borgman (gmail)]

If you add something like this to a doc string

\\{my-keymap}

the listing may contain several entries where the key binding is "Prefix 
Command". In what way is it useful to tell this in the list? Does not 
that just confuse users?

PS: Some time ago I asked if not commands in key binding listings should 
be surrounded with apostrophes (ie `the-command') so that they were made 
into clickabe links. I think I got no respons. What do you think?

In addition to that I wonder if it would not be useful with an optional 
long form of the key binding listing where the first line of the doc 
string where put on the line below (indented with some spaces).