> 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/snap2snomed-user-guide/how-to-.../3-mapping-with-snap2snomed/3.1-workflow/3.1.4-maintenance-workflow.md).

# Maintenance workflow

Snap2SNOMED supports maintenance of maps that have been created within the tool and also allows upload of simple maps in a defined format for maintenance.

Maintenance is supported through the following workflows

<table data-full-width="true"><thead><tr><th width="308.36798095703125">Action</th><th>Description</th></tr></thead><tbody><tr><td>Create new version of an existing map, update source scope (code system), target scope (code system) and migrate existing map rows</td><td><p>A new version of an existing map in the tool can be created through the project list by selecting the version to be copied and then creating a new version.</p><ul><li><p>For map rows that are copied, the tool will migrate</p><ul><li>source</li><li>target</li><li>relationship</li><li>status (e.g. DRAFT, MAPPED, ACCEPTED, etc.)</li><li>last author/reviewer data</li></ul></li></ul></td></tr><tr><td>Identify changes in map due to change in source scope</td><td><p>Removed or retired codes in the source</p><ul><li>tool will remove the rows from the map</li></ul><p>New codes in the source</p><ul><li>tool will create rows for the new source codes, with an empty target</li><li>Owners or members can filter empty target fields to create a task to complete mapping process</li></ul></td></tr><tr><td>Identify changes in map due to change in target scope</td><td><p>Out of scope or retired codes in the target</p><ul><li>Owners can use VALIDATE function in tool to identify out of scope codes</li><li>Owners or members can filter identified rows to create a task to update map targets and complete mapping process<br></li></ul><p>New target codes in code system</p><ul><li>Owners or members can filter relationship type for any type except for equivalent to create a task to review and update map targets and complete mapping process</li></ul></td></tr><tr><td>Upload existing map</td><td>An existing map can be uploaded into the tool to then be updated.</td></tr></tbody></table>

<div data-full-width="true"><figure><img src="/files/2EaL1BMMzJOYuHqK6B3A" alt=""><figcaption></figcaption></figure></div>

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