About updating your topic and map shells
At this point, your process may vary. These instructions assume that you originally created your custom topic and map shells using the instructions provided in Integrating DTDs for DITA 1.2 into the DITA CMS on the IXIASOFT documentation page. If you created your custom shells otherwise, you will need to apply these steps in an appropriate way to your shells. Contact IXIASOFT Support if you are not sure how to proceed.