In one example, a method for managing data includes identifying a dependent relation between a first version and a second version of a data element, wherein the first version is dependent upon the second version, and inserting a strong reference between the first version of the data element and the second version of the data element. Next, respective expiration times are determined for each of the first version and the second version, and a determination made as to whether the first version expires prior to the second version. When the second version has an expiration time prior to an expiration time of the first version, expiration of the second version is suspended.