You’ve asked for it, so here is a short-list of the differences between Sharepoint and Documentum:
- Sharepoint 2007 is tightly integrated with Office 2007. Documentum has some light integration with Office through Webtop Application Connectors. Documentum has stronger integration with other authoring applications including Dreamweaver, QuarkXPress, and Adobe InDesign.
- Sharepoint provides various mechanisms to access and modify content when offline (eg Outlook, Access, etc). Documentum only supports offline editing if you install Documentum Desktop application.
- Sharepoint 2007 supports rights management with Office 2007 natively. Documentum requires you to install Information Rights Manager to have this feature.
- Both Documentum and Sharepoint provide the ability to create custom object types. However, Sharepoint’s object model does not seem to support object inheritance.
- Lifecycle features (eg applying actions, defining entry criteria, applying lifecycle to multiple documents, etc) is more extensive in Documentum than in Sharepoint.
- Documentum security model is more extensive than Sharepoint. Documentum has extended permissions that allow users to perform specific functions (eg change ownership, change state, change permissions, etc).
- All objects in Documentum are secured using the security model. In Sharepoint only certain objects can be secured (eg web site, list, folders, documents, etc).
- Content can be only published to Sharepoint site; however, if content needs to publish outside of MOSS repository, this requires custom coding. Content can be published to any website using Documentum Site Caching and Site Delivery Services. Documentum also has portlets for various portal vendors that allow those portals to access content that is stored in Documentum repository.
Please feel free to comment on any other feature differences.