EN XMI 2.4 supports the latest class="highlight">UML 2.4 standard and also provides backward compatibility with class="highlight">UML 2.0, class="highlight">UML 2.1, class="highlight">UML 2.2 and class="highlight">UML 2.3. UModel can import XMI files that describe models in any class="highlight">UML 2 version.