Documentum is a platform for Enterprise Content Management System, that has multiple clients like WebTop. D2..etc, for the end users to access/manage the content. D2 is one of the Documentum Client, which has flexible widget based application to meet faster development cycles with better end user interaction. D2 LS is solution meant for Pharma industries, which is designed on top of D2. You can more details on all Documentum details in OpenText Trainings https://www.otlearning.com/ or from Documentation from support.opentext.com
Hope this helps:) Hari.
