---
title: Glossary
slug: epmm/release-upgrade-guide/glossary
createdAt: 2026-10-06T07:44:58.477Z
---

| **Term**         | **Description**                                                                                                                                                                                                                                                                             |
| ---------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| ClientID         | Represents the unique identifier for the registered client. It takes a long value.<br />For example: 1073741831                                                                                                                                                                             |
| RegistrationUUID | It represents unique Android device ID. On Android 8.0 (API level 26) and higher versions of the platform, a 64-bit number (expressed as a hexadecimal string), unique to each combination of app-signing key, user, and device. Values of `Android_ID` are scoped by signing key and user. |
| UserUUID         | Unique ID assigned to the user created in the system. The length is 36 characters.<br />For example: db4c2053-ec5e-4fdb-aed6-f0bcddb705d2                                                                                                                                                   |