---
title: "Maintenance Task Lists: Rules SAP Applies"
description: "What SAP S/4HANA Cloud allows and refuses for task lists and their parts, in plain words, and what MDM does about each rule."
source: "https://help.rikaiso.com/public-cloud/2026.2/task-list-sap-rules"
edition: "public-cloud"
editionLabel: "S/4HANA Public Cloud"
version: "2026.2"
latest: true
language: "en"
section: "Objects and Fields > Asset Management > Maintenance Task Lists"
updated: "2026-11-05"
---

# Maintenance Task Lists: Rules SAP Applies

> What SAP S/4HANA Cloud allows and refuses for task lists and their parts, in plain words, and what MDM does about each rule.

> **Draft brief for authors.** From the findings of the help-portal notes: keys SAP assigns and writes back; the composite keys an operation row must carry; what the task list interface answers differently from the equipment interface (in business terms, no protocol talk); units and descriptions per language.

**Related information:** `messages-from-sap`, `maintenance-task-lists`.

**Source in the product repository:** `docs/help-portal/task-lists.md` §2, `docs/help-portal/findings/API_MAINTENANCETASKLIST.json`.