These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.62 s (backtrack: 0/20).

[ebuild  N     ] x11-apps/xprop-1.2.8::gentoo  144 KiB
[ebuild  N     ] x11-apps/xset-1.2.6::gentoo  143 KiB
[ebuild   R    ] app-text/xmlto-0.0.28-r11::gentoo  USE="text* -latex" 125 KiB
[ebuild  N     ] x11-misc/xdg-utils-1.2.1-r11::gentoo  USE="X dbus -doc -gnome -perl -plasma" 287 KiB

Total: 4 packages (3 new, 1 reinstall), Size of downloads: 699 KiB

The following USE changes are necessary to proceed:
 (see "package.use" in the portage(5) man page for more details)
# required by x11-misc/xdg-utils-1.2.1-r11::gentoo
# required by =x11-misc/xdg-utils-1.2.1-r11 (argument)
>=app-text/xmlto-0.0.28-r11 text