Today, we uploaded the BDMP's custom TEI schema to the website (both in ODD and RelaxNG formats). These schemata can be used by BDMP contributors to validate their XML, or by anyone else who is interested. For more information (and the link to download the schema), please refer to our Validation page. Note, however, that the best and easiest way to learn which tags we use when, and why is of course still the Encoding Manual (and our The Tags section in particular).