A productivity entity container data structure is created that includes information for a first productivity entity and a link to a second productivity entity. The information for the first productivity entity includes either a link to the first productivity entity or details for the first productivity entity stored directly in the productivity entity container data structure. The first productivity entity and the second productivity entity are of different productivity entity types (e.g., an assigned task associated with a scheduled calendar event). By using the productivity entity container data structure to link together multiple different productivity entities of different productivity entity types, computer-based productivity systems are configured to directly access and display information for related productivity entities of different productivity entity types in a unified-view interface.