Which engine supports older features related to portal types?

The Channel Engine is specifically designed to manage and support the older features related to portal types within the Appian platform. It provides the necessary framework for managing various application functionalities that relate to the user interface and how users interact with applications in a portal setting. This includes handling the display of content and the interaction models that were prevalent in earlier iterations of Appian's development environment, particularly with regards to how data and functionalities were presented in a portlet format.

The other engines serve distinct roles within the Appian ecosystem. The Process Execution Engine is focused on executing processes defined within the application, while the Content Engine primarily deals with document storage and management. The Collaboration Statistics Engine is involved in analyzing and presenting collaboration metrics. Consequently, these engines do not have the specific functionality or support for older portal type features that the Channel Engine provides.