You can get a list of schemas with:
gsettings list-schemas
org.gnome.rhythmbox.library org.gnome.shell.overrides org.gnome.system.proxy.https org.nemo.preferences org.gnome.settings-daemon.plugins.cursor org.gnome.evolution.shell org.gnome.evolution.plugin.face-picture com.ubuntu.update-manager org.gnome.shell.extensions.auto-move-windows org.gnome.eog.fullscreen org.gnome.login-screen org.gnome.eog.view org.gnome.evolution-data-server.calendar org.gnome.evolution.plugin.itip org.gnome.evolution.plugin.autocontacts org.gnome.evolution.plugin.attachment-reminder com.canonical.a11y-profile-manager org.gnome.libgnomekbd org.gnome.rhythmbox.plugins.mtpdevice org.gnome.desktop.search-providers org.gnome.evolution.shell.network-config org.gnome.Logs org.gnome.rhythmbox.player org.gnome.calculator org.gnome.settings-daemon.plugins.a11y-settings org.gnome.DejaDup.Rackspace org.gnome.system.smb org.gnome.desktop.media-handling org.gnome.software org.gnome.settings-daemon.plugins.smartcard org.freedesktop.Telepathy.Logger org.gnome.desktop.default-applications org.gnome.nm-applet org.gnome.settings-daemon.peripherals.keyboard org.gnome.gnome-system-log org.gnome.evolution org.gnome.settings-daemon.plugins org.gnome.Terminal.ProfilesList org.gnome.shell.app-switcher com.canonical.unity-gtk-module org.freedesktop.Tracker org.gnome.Contacts org.gnome.gedit.state org.gnome.gedit.preferences.ui org.gnome.rhythmbox.plugins.magnatune org.gnome.documents org.gnome.FileRoller.Dialogs.New org.gnome.gedit.plugins org.gnome.settings-daemon.plugins.gsdwacom org.gnome.desktop.a11y.mouse org.gtk.Settings.Debug org.gnome.shell.extensions.screenshot-window-sizer org.gnome.desktop.wm.preferences org.gnome.seahorse.recipients org.gnome.gedit.state.history-entry org.gnome.online-accounts org.gnome.mutter.keybindings org.gnome.settings-daemon.plugins.xsettings org.gnome.FileRoller.Dialogs.LastOutput org.gnome.Empathy.conversation org.gnome.nautilus.window-state org.gnome.gedit.plugins.terminal org.gnome.yelp org.gnome.libgnomekbd.keyboard org.gnome.gnome-screenshot org.nemo.privacy org.gnome.DejaDup.GDrive org.gnome.evolution.plugin.prefer-plain org.gnome.shell.window-switcher com.ubuntu.notifications.hub org.gnome.seahorse org.gnome.settings-daemon.plugins.media-keys org.gnome.totem.plugins.opensubtitles org.gnome.Empathy.sounds org.gnome.settings-daemon.plugins.color org.gnome.evolution-data-server org.gnome.totem org.gnome.baobab.preferences org.nemo.icon-view org.gnome.FileRoller.Dialogs.Add org.gnome.settings-daemon.plugins.gdu-sd org.gnome.evolution.plugin.publish-calendar org.freedesktop.ibus.general.xkblayoutconfig org.gnome.settings-daemon.plugins.xrandr org.gnome.baobab.ui org.gnome.shell.extensions.classic-overrides org.gnome.desktop.a11y.keyboard org.gnome.settings-daemon.plugins.orientation org.gnome.desktop.a11y org.gnome.system.proxy.socks org.gnome.desktop.interface org.freedesktop.Tracker.FTS org.gnome.system.proxy org.gnome.mousetweaks org.gnome.gedit.preferences org.gnome.desktop.lockdown org.gnome.settings-daemon.plugins.housekeeping org.gnome.Empathy.notifications org.gnome.desktop.a11y.applications org.gnome.mutter.wayland.keybindings org.gnome.rhythmbox.sources org.gnome.settings-daemon.plugins.rfkill org.gnome.gedit.preferences.print org.gnome.evolution.spamassassin org.freedesktop.Tracker.Miner.Files org.gnome.Maps org.gnome.settings-daemon.plugins.datetime org.nemo.sidebar-panels.tree org.gnome.Evince.Default org.gnome.rhythmbox org.gnome.settings-daemon.plugins.clipboard org.gnome.libgnomekbd.preview org.gnome.desktop.default-applications.office.calendar org.gnome.mines org.gnome.shell org.gnome.Empathy.hints org.gnome.Terminal.Legacy.Settings org.gnome.brasero.config org.gnome.desktop.screensaver org.gnome.eog.plugins org.gnome.system.locale org.gnome.settings-daemon.plugins.updates org.gnome.desktop.wm.keybindings org.gnome.eog org.gnome.system.proxy.ftp org.gnome.evolution.addressbook org.gnome.sudoku org.gnome.gedit org.gnome.Disks org.freedesktop.Tracker.DB apps.nautilus-pastebin org.freedesktop.Tracker.Needle org.gnome.evolution.bogofilter org.gnome.mutter org.freedesktop.folks org.gnome.gedit.preferences.encodings org.gnome.evolution.importer org.gnome.FileRoller.Listing org.freedesktop.Tracker.Writeback org.gnome.gnome-system-monitor org.gnome.system.proxy.http org.gnome.SessionManager org.gnome.gedit.state.window org.nemo.desktop org.nemo.list-view org.gnome.desktop.background org.freedesktop.ibus.general org.gnome.Evince org.gnome.Empathy.ui org.gnome.baobab org.gnome.evolution.calendar org.gnome.brasero org.gnome.settings-daemon.peripherals org.gnome.desktop.peripherals com.ubuntu.user-interface ca.desrt.dconf-editor.Settings com.canonical.indicator.sound org.gnome.desktop.notifications org.gnome.gedit.plugins.time org.gnome.gedit.plugins.filebrowser.nautilus org.gnome.Empathy.location org.gnome.Charmap org.gnome.FileRoller org.gnome.Weather.Application org.gnome.Cheese org.gnome.gedit.plugins.filebrowser com.ubuntu.sound org.gnome.desktop.peripherals.mouse org.gnome.crypto.pgp org.gnome.FileRoller.General org.gnome.GWeather org.gnome.settings-daemon.plugins.screensaver-proxy org.gnome.desktop.default-applications.office.tasks org.gnome.Empathy.call org.gnome.books org.gnome.desktop.app-folders org.gnome.gedit.preferences.editor org.gnome.settings-daemon.peripherals.smartcard org.gnome.gnome-system-monitor.openfilestree org.gnome.nautilus.list-view org.gnome.SimpleScan org.gnome.nautilus.icon-view org.nemo.compact-view org.gnome.rhythmbox.plugins.iradio org.gnome.desktop.peripherals.touchpad org.gnome.gnome-system-monitor.memmapstree org.gnome.DejaDup.File org.gnome.Music org.gnome.seahorse.manager org.gnome.evolution.plugin.external-editor org.gtk.Settings.FileChooser com.ubuntu.touch.sound org.gnome.DejaDup.S3 org.gnome.settings-daemon.plugins.remote-display org.gnome.shell.keyboard org.gnome.libgnomekbd.desktop org.gnome.shell.extensions.user-theme org.gnome.calendar org.gnome.gedit.state.file-filter org.gnome.mahjongg org.gnome.shell.calendar org.gnome.settings-daemon.plugins.background org.freedesktop.Tracker.Miner org.gnome.settings-daemon.plugins.a11y-keyboard org.gnome.Charmap.WindowState org.gnome.telepathy-account-widgets.ui org.gnome.rhythmbox.plugins.visualizer org.gnome.settings-daemon.peripherals.input-devices org.freedesktop.Tracker.Store org.gtk.Settings.ColorChooser org.gnome.desktop.privacy org.gnome.system.dns_sd org.freedesktop.ColorHelper org.gnome.rhythmbox.plugins.grilo org.gnome.desktop.a11y.magnifier org.gnome.seahorse.nautilus org.gnome.rhythmbox.plugins.replaygain org.gnome.rhythmbox.plugins.ipod org.gnome.rhythmbox.plugins.daap org.gnome.desktop.default-applications.office org.gnome.rhythmbox.rhythmdb org.gnome.desktop.sound org.gnome.evolution.mail org.gnome.desktop.datetime org.gnome.Vino com.ubuntu.touch.network org.gnome.rhythmbox.podcast org.gnome.evolution-data-server.addressbook org.gnome.evolution.plugin.templates org.gnome.evolution.plugin.mail-notification org.gnome.desktop.peripherals.keyboard org.gnome.settings-daemon.plugins.mouse org.gnome.settings-daemon.plugins.sharing org.gnome.crypto.cache org.gnome.rhythmbox.plugins.audiocd org.gnome.gedit.plugins.pythonconsole org.freedesktop.ibus.panel org.gnome.photos com.ubuntu.phone com.ubuntu.touch.system org.gnome.FileRoller.UI org.gnome.FileRoller.Dialogs.Extract org.gnome.FileRoller.Dialogs org.gnome.desktop.input-sources org.gnome.Evolution.DefaultSources org.gnome.desktop.default-applications.terminal org.gnome.eog.ui org.gnome.rhythmbox.plugins.android org.gnome.system.location org.gnome.rhythmbox.plugins org.gnome.shell.keybindings org.nemo.sidebar-panels org.gnome.libgnomekbd.indicator org.gnome.FileRoller.FileSelector org.gnome.settings-daemon.plugins.sound org.gnome.settings-daemon.plugins.power apps.gtkhash apps.gtkhash-properties org.nemo.window-state com.canonical.indicator.appmenu org.gnome.settings-daemon.plugins.keyboard org.nemo.plugins org.freedesktop.ibus org.gnome.rhythmbox.sharing org.gnome.brasero.display org.nemo org.gnome.desktop.session org.gnome.settings-daemon.peripherals.touchscreen org.freedesktop.gstreamer-0.10.default-elements org.gnome.gnome-system-monitor.proctree com.ubuntu.update-notifier org.gnome.nautilus org.gnome.desktop.peripherals.trackball org.gnome.meld org.gnome.evolution.eds-shell org.freedesktop.ibus.general.hotkey org.gnome.desktop.thumbnail-cache org.gnome.desktop.thumbnailers com.canonical.Unity.Lenses org.gnome.gedit.plugins.externaltools org.gnome.nautilus.preferences org.gnome.gnome-system-monitor.disktreenew im.telepathy.MissionControl.FromEmpathy org.gnome.brasero.filter com.canonical.indicator.messages org.gnome.DejaDup.OpenStack org.gnome.gedit.plugins.drawspaces org.freedesktop.Geoclue org.gnome.desktop.file-sharing org.gnome.shell.extensions.native-window-placement org.gnome.DejaDup.GCS org.gnome.DejaDup org.gnome.rhythmbox.plugins.lyrics org.gnome.settings-daemon.peripherals.mouse org.gnome.rhythmbox.plugins.generic-player org.gnome.evolution.plugin.email-custom-header org.gnome.gedit.plugins.wordcompletion org.freedesktop.Tracker.Extract org.gnome.shell.extensions.window-list org.gnome.settings-daemon.plugins.print-notifications org.gnome.totem.plugins.pythonconsole org.gnome.Empathy org.gnome.nautilus.desktop
Joel G Mathew, known in tech circles by the pseudonym Droidzone, is an opensource and programming enthusiast.
He is a full stack developer, whose favorite languages are currently Python and Vue.js. He is also fluent in Javascript, Flutter/Dart, Perl, PHP, SQL, C and bash shell scripting. He loves Linux, and can often be found tinkering with linux kernel code, and source code for GNU applications. He used to be an active developer on XDA forums, and his tinkered ROMS used to be very popular in the early 2000s.
His favorite pastime is grappling with GNU compilers, discovering newer Linux secrets, writing scripts, hacking roms, and programs (nothing illegal), reading, blogging. and testing out the latest gadgets.
When away from the tech world, Dr Joel G. Mathew is a practising ENT Surgeon, busy with surgeries and clinical practise.