[CentOS] rpm command option

Wed May 6 00:00:48 UTC 2020
Chris Olson <chris_e_olson at yahoo.com>

We located an application recommended by one of customers
for sharing certain data.  It was available for installation
using a few different methods.  Using yum was also recommended
for the installation.  The install instructions began with
what appeared to be a fairly typical command as indicated
below (with the URL slightly altered).

sudo rpm --import https://rpm.xxxxx.com/rpmrepo.key

To our junior employee assigned to perform the install
on a test system, it seemed like a good idea to do some
checking on the rpm option --import indicated in those
instructions.  They did not find the --import in any of
the 14 pages of the CentOS 7 man page for rpm.

Some Google searches indicated that the --import option
does exist.  The repo setup and application installation
all went well and took only about three minutes. The app
is also working as intended.

Is there some good reason for --import being left out of
the manual page?