> For the complete documentation index, see [llms.txt](https://docs.b2ihealthcare.com/snow-owl-authoring-platform/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.b2ihealthcare.com/snow-owl-authoring-platform/introduction/getting-started/login/included-snomed-ct-version.md).

# Included SNOMED CT Version

Snow Owl includes all versions of SNOMED CT since the January 31, 2002 release. To see the most recent release available in Snow Owl, double-click on SNOMED CT Concept in the SNOMED CT View. 

{% hint style="info" %}
By default, the view is located on the left-hand side of the authoring perspective layout.
{% endhint %}

![SNOMED CT View](/files/Y3ELsjmWIdPeSASDdfU8)

Detailed information about SNOMED CT will be displayed in the editor, which is located in the middle of your screen.

{% hint style="info" %}
The current version is specified in one of the synonym descriptions.
{% endhint %}

![SNOMED CT Release](/files/nqE3hzsrVwloPUIJvS2C)

To switch to an older version, select the Code Systems View at the bottom of the page. Expand the terminology, then Versions. You can see a list of the terminologies that are supported in Snow Owl. The version selector always shows the version that is currently used in Snow Owl. By default, the latest version is used, which is indicated with **`MAIN`**.

To work with an earlier version,

* Double-click on the version you want to switch to
* Confirm the dialog
* You can see that the older version is now in use as indicated in the Code Systems View by the ![](https://snowowl.atlassian.net/wiki/download/thumbnails/611024974/worddav54394d7c7596c749efa932e85abe83bb.png?version=1\&modificationDate=1578324571281\&cacheVersion=1\&api=v2\&width=25) current version icon and on the status bar at the bottom.

![Selecting SNOMED CT Version](/files/HWzknBeBvX37RQUZMpnJ)


---

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