+@item install-html
+@itemx install-dvi
+@itemx install-pdf
+@itemx install-ps
+These targets install documentation in formats other than Info;
+they're intended to be called explicitly by the person installing the
+package, if that format is desired. GNU prefers Info files, so these
+must be installed by the @code{install} target.
+
+When you have many documentation files to install, we recommend that
+you avoid collisions and clutter by arranging for these targets to
+install in subdirectories of the appropriate installation directory,
+such as @code{htmldir}. As one example, if your package has multiple
+manuals, and you wish to install HTML documentation with many files
+(such as the ``split'' mode output by @code{makeinfo --html}), you'll
+certainly want to use subdirectories, or two nodes with the same name
+in different manuals will overwrite each other.
+