- edit :: more than 1 files

- help-xcode* :: doing objc coding in emacs

- source-code-help :: major mode related document help in Emacs.

     For e.g., call help-xcode-title in objc-mode, which will generate
     a .html file and open it in Firefox, from there all xcode
     documentation containing the current word under emacs buffer as a
     topic are linked.