---
title: "Key Concepts"
description: "Tasks and staging, the identity SAP sees, changes and quota, editions and releases, languages, and the safety rules MDM never breaks."
source: "https://help.rikaiso.com/public-cloud/2026.2/key-concepts"
edition: "public-cloud"
editionLabel: "S/4HANA Public Cloud"
version: "2026.2"
latest: true
language: "en"
updated: "2026-11-05"
---

# Key Concepts

> Tasks and staging, the identity SAP sees, changes and quota, editions and releases, languages, and the safety rules MDM never breaks.

> **Draft brief for authors.** Section page. Short explanation pages the task topics link to instead of repeating the theory.

## In this section

- [Tasks, Staging and Records](https://help.rikaiso.com/public-cloud/2026.2/concept-tasks-and-staging.md): The staging area as a safe copy, one Task per upload and object, the statuses, and typed rows versus file rows.
- [The Identity SAP Sees](https://help.rikaiso.com/public-cloud/2026.2/concept-identity.md): Whether SAP records a change under your own user or under the integration user, how to tell which applies, and what it means for authorizations and change documents.
- [Changes and Quota](https://help.rikaiso.com/public-cloud/2026.2/concept-quota.md): What costs a unit of your add-on's quota, what does not, where to see the use, and what happens at the limit.
- [Editions and Releases](https://help.rikaiso.com/public-cloud/2026.2/concept-editions.md): Public Edition versus Private Edition, how MDM detects your release and applies only what it knows for certain, and what differs for you.
- [Languages: The App, the Template and SAP](https://help.rikaiso.com/public-cloud/2026.2/concept-languages.md): The app language, the language MDM sends to SAP, descriptions stored per language, units per language, and files prepared in one language and used in another.
- [What MDM Never Does](https://help.rikaiso.com/public-cloud/2026.2/concept-safety-rules.md): The rules MDM keeps whatever happens: never sends a create, delete or operation twice, never retries an unknown outcome by itself, never guesses, never changes SAP on an upload or an edit.