In 2.1, Mingle introduces new property type - card relationship property. Card relationship properties can have a card as its property value. Before 2.1, only tree relationship properties were able to take card as its value. Card relationship properties allow users to create a relationship between cards. For example, user can make a defect to connect to a story. This can be changed to another story or bug as needed.

where 'Depend on' is a card relationship property which points to story card '#7 Story 1' as its value.

• Create a card relationship property
• Modify or delete a card relationship property