emz File Type And Xnviewmp

Meralco, my utilities company emailed a form attachment in a format I've not encountered before. It's in emz file format. emz is a compressed image file. It's a proprietary format from Microsoft. I had to look for an appropriate application to open this file. Happily I found Xnviewmp. It's available in the Arch User Repository here. So Installing Xnviewmp is just:

[donato@archdesktop builds]$ git clone https://aur.archlinux.org/xnviewmp-system-libs.git
Cloning into 'xnviewmp-system-libs'...
remote: Counting objects: 26, done.
remote: Compressing objects: 100% (21/21), done.
remote: Total 26 (delta 10), reused 16 (delta 4)
Unpacking objects: 100% (26/26), done.
[donato@archdesktop xnviewmp]$ makepkg -sic
==> Making package: xnviewmp 0.86-1 (Fri May 26 20:28:46 +08 2017)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving sources...
  -> Found xnviewmp.desktop
  -> Downloading XnViewMP-linux-x64_0.86-rel1.tgz...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 50.4M  100 50.4M    0     0   113k      0  0:07:33  0:07:33 --:--:--  112k
==> Validating source files with md5sums...
    xnviewmp.desktop ... Passed
==> Validating source_x86_64 files with md5sums...
    XnViewMP-linux-x64_0.86-rel1.tgz ... Passed
==> Extracting sources...
  -> Extracting XnViewMP-linux-x64_0.86-rel1.tgz with bsdtar
==> Entering fakeroot environment...
==> Starting package()...
==> Tidying install...
  -> Removing libtool files...
  -> Purging unwanted files...
  -> Removing static library files...
  -> Stripping unneeded symbols from binaries and libraries...
  -> Compressing man and info pages...
==> Checking for packaging issue...
==> Creating package "xnviewmp"...
  -> Generating .PKGINFO file...
  -> Generating .BUILDINFO file...
  -> Generating .MTREE file...
  -> Compressing package...
==> Leaving fakeroot environment.
==> Finished making: xnviewmp 0.86-1 (Fri May 26 20:37:09 +08 2017)
==> Installing package xnviewmp with pacman -U...
[sudo] password for donato:
loading packages...
resolving dependencies...
looking for conflicting packages...

Packages (1) xnviewmp-0.86-1

Total Installed Size:  133.19 MiB

:: Proceed with installation? [Y/n]
(1/1) checking keys in keyring                                                               [######################################################] 100%
(1/1) checking package integrity                                                             [######################################################] 100%
(1/1) loading package files                                                                  [######################################################] 100%
(1/1) checking for file conflicts                                                            [######################################################] 100%
(1/1) checking available disk space                                                          [######################################################] 100%
:: Processing package changes...
(1/1) installing xnviewmp                                                                    [######################################################] 100%
Optional dependencies for xnviewmp
    gvfs: support for moving files to trash [installed]
:: Running post-transaction hooks...
(1/2) Arming ConditionNeedsUpdate...
(2/2) Updating the desktop file MIME type cache...
==> Cleaning up...
[donato@archdesktop xnviewmp]$