xdg-utils binary package in Ubuntu Mantic amd64

 xdg-utils contains utilities for integrating applications with the
 desktop environment, regardless of which desktop environment is used.
 .
 The following utilities are included:
 .
  * xdg-desktop-menu - Install desktop menu items
  * xdg-desktop-icon - Install icons on the user's desktop
  * xdg-email - Compose a new email in the user's preferred email client,
    potentially with subject and other info filled in
  * xdg-icon-resource - Install icon resources
  * xdg-mime - Query and install MIME types and associations
  * xdg-open - Open a URI in the user's preferred application that
    handles the respective URI or file type
  * xdg-screensaver - Enable, disable, or suspend the screensaver
  * xdg-settings - Get or set the default web browser and URI handlers

Source package