A new "Has Parent Relationship" system property is added to files to enable you to clean up your environment from unused design and avoid releasing them. It helps to identify whether the files have any associated relationships.
With this property, you can list all the orphaned files within a project by searching the "Has Parent Relationship = False" so that you can delete those orphaned files without vault restriction. You can use this property for search and customize views where the Has Parent Relationship icon is displayed if the value is true.
