gsettings-desktop-schemas software package provides GSettings deskop-wide schemas, you can install in your Ubuntu 12.04 LTS (Precise Pangolin) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gsettings-desktop-schemas
gsettings-desktop-schemas is installed in your system.
Make ensure the gsettings-desktop-schemas package were installed using the commands given below,
$ sudo dpkg-query -l | grep gsettings-desktop-schemas *
You will get with gsettings-desktop-schemas package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Libraries |
| Package | gsettings-desktop-schemas |
| Version | 3.4.1-0ubuntu1 |
| Description | GSettings deskop-wide schemas |
| Sub Section | libs |