4.5 is a major release that brings DeepaMehta's basis for Sharing/Collaboration to the next level. For the first time the user can control how (if at all) the content of a workspace is accessible/editable by other users. To accommodate typical sharing/collaboration scenarios 5 access levels are pre-defined: Private, Confidential, Collaborative, Public, and Common. The access levels are enforced by the DeepaMehta backend, so that confidential content is never exposed to unauthorized users. For the first time DeepaMehta supports Privacy. For plugin developers the highlight feature of DeepaMehta 4.5 is Service injection for migrations. This is helpful for the development of upgradable plugins. For detailed information see the Release Notes.