> 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/description-logic/running-the-classification.md).

# Running the Classification

To start the classification, press the <img src="https://content.gitbook.com/content/N7ynFOLTw3W9Zow9AaAJ/blobs/BnyKfknDEy86g0T6Mop7/602539369%20(1)%20(1).png" alt="" data-size="line"> *Classify Ontology* button in the main toolbar. The reasoner now evaluates the defining relationships between the concepts to infer new connections and identify unnecessary or redundant ones. Afterward, an ontology-comparison process calculates the changes that the reasoner found between the old and the new ontology.

Get more information about classifying:

{% content-ref url="/pages/-MX7RnIEBt4Jq0vDp9Fd" %}
[Classification](/snow-owl-authoring-platform/editing-and-authoring/evaluating-changes/classifying.md)
{% endcontent-ref %}