Switching between versions

Apart from the latest release of SNOMED CT, Snow Owl allows browsing and editing older versions of SNOMED CT. You can also switch between versions of LCS, MS, VD, LOINC, ATC.

To select a version, click the icon in the toolbar or select Tools > Select version in the menu. You can see a list of the terminologies and local code systems 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. If you are using an older version, you will see the release date (for SNOMED CT), or the version number (e.g. for Local code systems).

To work with an earlier version version,

Selecting a SNOMED CT release

Another way to verify that you are working with the selected release is by opening the root concept in the editor where the information about the version is listed as a synonym.

SNOMED CT root concept from July 2006 release

Please note that the tree in the SNOMED CT view might also change, since older SNOMED CT releases had different top-level concepts (e.g. Disease used to be a top-level concept).

SNOMED CT concept navigator displaying top-level concepts from the Jan 2002 version

The status bar on the bottom indicates the current version of the artefact the user is working with. There are two scenarios:

  1. User is working on a task - the status bar displays the task name (with a link to the task editor) as well as the context of the task (Terminology and version). If you hover over the task icon, you can see additional information about the task (number, name, context, scenario).
  2. User is not working on a task - "No task activated" text is presented and status bar displays the version of the currently selected artefact.

Tooltip displaying additional task information