# Compare Reference Sets

To execute a Reference Sets compare, navigate to `Tools > Compare reference sets...` menu item.

<figure><img src="/files/oMzyqkQQiPnSbws8LUgK" alt=""><figcaption><p>Compare reference sets feature</p></figcaption></figure>

A wizard opens where the `Base` and the `Target` Reference Sets can be selected from the lists for comparison.

<figure><img src="/files/VuXDH7qIUsovPL2ckQ1W" alt=""><figcaption><p>Compare wizard</p></figcaption></figure>

After the comparison process, a dedicated read-only editor opens with a table summarizing the results of the comparison. A Summary section at the top displays the overall statistics of the comparison, which can be collapsed. The summary part - as well as the `Explanation` column below - determines the status of the given mapping according to the selected *Base (Abdominal Pain 1)* Reference Set. For example, if a mapping receives a `Missing` status, then it is missing from the *Base* *(Abdominal Pain 1)* Reference Set and only the *Target (Abdominal Pain 2)* Reference Set contains that particular mapping.

![Map Compare Result](/files/-MWOazAI4iHGytW0CZgA)

Identical mappings can be filtered out by clicking on the ![](https://snowowl.atlassian.net/wiki/download/attachments/611027327/icon-02.png?version=1\&modificationDate=1604066510639\&cacheVersion=1\&api=v2) **Hide identical mappings** button in the top-right corner of the editor.

The editor toolbar also offers the ![](https://snowowl.atlassian.net/wiki/download/attachments/1333985647/image2020-12-10_14-20-30.png?version=1\&modificationDate=1607606428947\&cacheVersion=1\&api=v2) **Export the compare results separated by semicolon to a text file** button which enables users to export the necessary information from the Map Compare Result.

![Map Compare Export Wizard](/files/-MWOcLlRF085hN-iXpHa)


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