PDR 1.4.3 is the version of the PDR code released in december 2011. In this version, Langmuir-Hinshelwood and Eley-Rideal mechanisms are implemented for H<sub><span class="cmr-8">2</span></sub> formation on grains. <br/>Several atomic and molecular data have been updated (collision rates of O, photo-reactions cross sections, ...). The chemical network has also been updated from different references. Level excitation and line intensities of CH<sup><span class="cmr-8">+</span></sup> and OH have been introduced for comparison to observations.<br/>See Le Bourlot et al. (2011) for more informations.