> For the complete documentation index, see [llms.txt](https://docs.snomed.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.snomed.org/snomed-ct-user-guides/mrcm-maintenance-tool-user-guide/introduction.md).

# Introduction

The Public MRCM Maintenance Tool presents a human-readable and navigable interface for the rules and constraints applicable to the SNOMED CT concept model.

It provides an online interactive MRCM reference for SNOMED CT content authors and reviewers.

<details>

<summary>Who can use the Public MRCM Maintenance Tool?</summary>

Anyone with a Chrome web browser, so long as it is for reference and educational purposes.

</details>

<details>

<summary>When can I use it?</summary>

* Any time, subject to occasional maintenance - the service is an online web-based application running continuously between occasional scheduled or emergency maintenance.
* Scheduled maintenance may include new features, improvements, defect fixes and hosting environment updates.
* Emergency maintenance may include operating system patches and security updates as well as high priority defect fixes.

</details>

<details>

<summary>Where should I use it?</summary>

Anywhere you can use a web browser with a preferred screen size of 1600 x 900 pixels or greater. Lower resolutions may be usable, but not optimized for the application components screen layout. The application is designed for use with, and tested in, the Chrome web browser.

</details>

<details>

<summary>How can I use it?</summary>

* The MRCM Maintenance Tool is a web services application designed to be used on a personal computer with a good internet connection via the Google Chrome web browser.
* Recommended client platform requirements:
  * Operating System and hardware specifications as for Chrome.
  * Minimum monitor resolutions:
    * 1600 x 900 px (HD+ 16:9)
    * 1680 x 1050 px (WSXGA+ 16:10)
    * 1600 x 1200 px (UXGA 4:3)
* Internet connection:
  * Broadband (4G minimum)
* Other combinations of web browsers, machine hardware, lower screen resolutions and slower internet connectivity may still work but are not optimized and not supported.

</details>


---

# Agent Instructions
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```

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