file menu-cache--etc-xdg-xfce4-desktop-menu.xml.fr.rc

[kevin]

Hello,

can anybody tell me what is this file used for?

.cache/xfce4/desktop/menu-cache--etc-xdg-xfce4-desktop-menu.xml.fr.rc

What is mtime?

Here is the beginning of this file for a user named "laurence":
==========================
[settings]
using_system_menu=true

[files]
location0=/etc/xdg/xfce4/desktop/menudefs.hook
mtime0=1217785479
location1=/etc/xdg/xfce4/desktop/menu.xml.fr
mtime1=1159296969

[directories]
location0=/home/laurence/.local/share/applications/
mtime0=1221519494
location1=/usr/share/applications//kde
mtime1=1212342443
location2=/usr/share/applications/
mtime2=1217776037
location3=/usr/share/applications//kde
mtime3=1212342443
location4=/usr/share/applications/
mtime4=1217776037