This file is indexed.

/usr/share/glib-2.0/schemas/org.gnome.settings-daemon.peripherals.gschema.xml is in gnome-settings-daemon-schemas 3.18.2-0ubuntu3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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<?xml version="1.0" encoding="UTF-8"?>
<schemalist>
  <schema path="/org/gnome/settings-daemon/peripherals/" id="org.gnome.settings-daemon.peripherals" gettext-domain="gnome-settings-daemon">
    <child schema="org.gnome.settings-daemon.peripherals.smartcard" name="smartcard"/>
    <child schema="org.gnome.settings-daemon.peripherals.keyboard" name="keyboard"/>
    <child schema="org.gnome.settings-daemon.peripherals.mouse" name="mouse"/>
    <child schema="org.gnome.settings-daemon.peripherals.touchscreen" name="touchscreen"/>
    <child schema="org.gnome.settings-daemon.peripherals.input-devices" name="input-devices"/>
  </schema>
  <schema path="/org/gnome/settings-daemon/peripherals/smartcard/" id="org.gnome.settings-daemon.peripherals.smartcard" gettext-domain="gnome-settings-daemon">
    <key name="removal-action" enum="org.gnome.settings-daemon.GsdSmartcardRemovalAction">
      <default>'none'</default>
      <summary>Smartcard removal action</summary>
      <description>Set this to one of "none", "lock-screen", or "force-logout". The action will get performed when the smartcard used for log in is removed.</description>
    </key>
  </schema>
  <schema path="/org/gnome/settings-daemon/peripherals/keyboard/" id="org.gnome.settings-daemon.peripherals.keyboard" gettext-domain="gnome-settings-daemon">
    <key type="b" name="click">
      <default>true</default>
    </key>
    <key type="i" name="click-volume">
      <default>0</default>
    </key>
    <key name="bell-mode" enum="org.gnome.settings-daemon.GsdBellMode">
      <default>'on'</default>
      <description>Possible values are "on", "off", and "custom".</description>
    </key>
    <key type="i" name="bell-pitch">
      <default>400</default>
    </key>
    <key type="i" name="bell-duration">
      <default>100</default>
    </key>
    <key type="s" name="bell-custom-file">
      <default>''</default>
      <summary>Keyboard Bell Custom Filename</summary>
      <description>File name of the bell sound to be played.</description>
    </key>
    <key type="b" name="remember-numlock-state">
      <default>true</default>
      <summary>Remember NumLock state</summary>
      <description>When set to true, GNOME will remember the state of the NumLock LED between sessions.</description>
    </key>
    <key name="numlock-state" enum="org.gnome.settings-daemon.GsdNumLockState">
      <default>'unknown'</default>
      <summary>NumLock state</summary>
      <description>The remembered state of the NumLock LED.</description>
    </key>
  </schema>
  <schema path="/org/gnome/settings-daemon/peripherals/mouse/" id="org.gnome.settings-daemon.peripherals.mouse" gettext-domain="gnome-settings-daemon">
    <key type="b" name="locate-pointer">
      <default>false</default>
      <summary>Highlights the current location of the pointer when the Control key is pressed and released.</summary>
    </key>
    <key type="i" name="double-click">
      <default>400</default>
      <summary>Double click time</summary>
      <description>Length of a double click in milliseconds.</description>
    </key>
    <key type="i" name="drag-threshold">
      <default>8</default>
      <summary>Drag threshold</summary>
      <description>Distance before a drag is started.</description>
    </key>
  </schema>
  <schema path="/org/gnome/settings-daemon/peripherals/touchscreen/" id="org.gnome.settings-daemon.peripherals.touchscreen" gettext-domain="gnome-settings-daemon">
    <key type="b" name="orientation-lock">
      <default>false</default>
      <summary>Whether the tablet's orientation is locked, or rotated automatically.</summary>
    </key>
  </schema>
  <schema path="/org/gnome/settings-daemon/peripherals/input-devices/" id="org.gnome.settings-daemon.peripherals.input-devices" gettext-domain="gnome-settings-daemon">
    <key type="s" name="hotplug-command">
      <default>''</default>
      <summary>Device hotplug custom command</summary>
      <description>Command to be run when a device is added or removed. An exit value of 1 means that the device will not be handled further by gnome-settings-daemon.</description>
    </key>
  </schema>

  
  <schema id="org.gnome.settings-daemon.peripherals.mouse.deprecated">
    <key type="b" name="left-handed">
      <default>false</default>
      <summary>Mouse button orientation</summary>
      <description>Swap left and right mouse buttons for left-handed mice.</description>
    </key>
    <key type="d" name="motion-acceleration">
      <default>-1</default>
      <summary>Single Click</summary>
      <description>Acceleration multiplier for mouse motion. A value of -1 is the system default.</description>
    </key>
    <key type="i" name="motion-threshold">
      <default>-1</default>
      <summary>Motion Threshold</summary>
      <description>Distance in pixels the pointer must move before accelerated mouse motion is activated. A value of -1 is the system default.</description>
    </key>
    <key type="b" name="middle-button-enabled">
      <default>false</default>
      <summary>Middle button emulation</summary>
      <description>Enables middle mouse button emulation through simultaneous left and right button click.</description>
    </key>
  </schema>
  <schema id="org.gnome.settings-daemon.peripherals.keyboard.deprecated">
    <key type="b" name="repeat">
      <default>true</default>
    </key>
    <key type="u" name="repeat-interval">
      <default>30</default>
      <summary>Key Repeat Interval</summary>
      <description>Delay between repeats in milliseconds.</description>
    </key>
    <key type="u" name="delay">
      <default>500</default>
      <summary>Initial Key Repeat Delay</summary>
      <description>Initial key repeat delay in milliseconds.</description>
    </key>
  </schema>
  <schema id="org.gnome.settings-daemon.peripherals.touchpad.deprecated">
    <key type="b" name="disable-while-typing">
      <default>false</default>
      <summary>Disable touchpad while typing</summary>
      <description>Set this to TRUE if you have problems with accidentally hitting the touchpad while typing.</description>
    </key>
    <key type="b" name="horiz-scroll-enabled">
      <default>true</default>
      <summary>Enable horizontal scrolling</summary>
      <description>Set this to TRUE to allow horizontal scrolling by the same method selected with the scroll_method key.</description>
    </key>
    <key name="scroll-method" enum="org.gnome.settings-daemon.GsdTouchpadScrollMethod">
      <default>'two-finger-scrolling'</default>
      <summary>Select the touchpad scroll method</summary>
      <description>Select the touchpad scroll method. Supported values are: "disabled", "edge-scrolling", "two-finger-scrolling".</description>
    </key>
    <key type="b" name="tap-to-click">
      <default>false</default>
      <summary>Enable mouse clicks with touchpad</summary>
      <description>Set this to TRUE to be able to send mouse clicks by tapping on the touchpad.</description>
    </key>
    <key type="b" name="touchpad-enabled">
      <default>true</default>
      <summary>Enable touchpad</summary>
      <description>Set this to TRUE to enable all touchpads.</description>
    </key>
    <key name="left-handed" enum="org.gnome.settings-daemon.GsdTouchpadHandedness">
      <default>'mouse'</default>
      <summary>Touchpad button orientation</summary>
      <description>Swap left and right mouse buttons for left-handed mice with 'left', 'right' for right-handed, 'mouse' to follow the mouse setting.</description>
    </key>
    <key type="d" name="motion-acceleration">
      <default>-1</default>
      <summary>Single Click</summary>
      <description>Acceleration multiplier for mouse motion. A value of -1 is the system default.</description>
    </key>
    <key type="i" name="motion-threshold">
      <default>-1</default>
      <summary>Motion Threshold</summary>
      <description>Distance in pixels the pointer must move before accelerated mouse motion is activated. A value of -1 is the system default.</description>
    </key>
    <key type="b" name="natural-scroll">
      <default>false</default>
      <summary>Natural scrolling</summary>
      <description>Set this to TRUE to enable natural (reverse) scrolling for touchpads.</description>
    </key>
  </schema>
  <schema id="org.gnome.settings-daemon.peripherals.trackball.deprecated">
    <key type="i" name="scroll-wheel-emulation-button">
      <default>0</default>
      <range min="0" max="24"/>
      <summary>Mouse wheel emulation button. 0 to disable the feature.</summary>
    </key>
  </schema>
</schemalist>