[APIM] OAS validation

Author: dlepow

articles/api-management/import-api-from-oas.md

@@ -100,6 +100,10 @@ After importing the API, if needed, you can update the settings by using the [Se
 
 [!INCLUDE [api-management-define-api-topics.md](../../includes/api-management-define-api-topics.md)]
 
+## Validate against an OpenAPI specification
+
+You can configure API Management [validation policies](api-management-policies.md#validation-policies) to validate requests and responses (or elements of them) against the schema in an OpenAPI specification. For example, use the [validate-content](validate-content-policy.md) policy to validate the size or content of a request or response body.
+
 ## Next steps
 
 > [!div class="nextstepaction"]