Re: Function for deleting a key binding in a sparse keymap

[Richard M. Stallman]

    First the keyboard input events must be translated (@pxref{Translating
    Input}).  This is done in two steps, first character translation and
    then key sequence translation:

I don't think that belongs in this node.  These things should be
documented elsewhere.  What is needed here is a brief statement that
key lookup is separate from key input, with mention of
read-key-sequence, and an xref.

    The keymap entry could also be a keymap.  In that case the next event
    is looked up in that keymap.  

    (@strong{But what happens if there is no hit there, I can not find any
    documentation on this???})

The question is not clear.  "No hit there"--where is "there"?

    @lisp
    (or (if overriding-terminal-local-map
            (FIND-IN overriding-terminal-local-map)
          (if overriding-local-map
              (FIND-IN overriding-local-map)
            (or (FIND-IN (get-text-property (point) 'keymap))
                (FIND-IN-ANY emulation-mode-map-alists)
                (FIND-IN-ANY minor-mode-overriding-map-alist)
                (FIND-IN-ANY minor-mode-map-alist)
                (FIND-IN (get-text-property (point) 'local-map))
                (FIND-IN (current-local-map)))))
        (FIND-IN (current-global-map)))

Please use @var instead of capital letters.

    @noindent
    @strong{Remark 2:} Characters that are bound to
    @code{self-insert-command} are translated according to
    @code{translation-table-for-input} before insertion.

How self-insert-command works is not part of this topic.
It might be desirable to add this info somewhere else,
but here it does not belong.

    @noindent
    @strong{Remark 3:} You may find the function
    @code{current-active-maps} useful when looking into this.

Such vagueness is unhelpful.  Please say what the function does.
Then add an xref to it.