24. The non-transitory computer readable medium according to claim 23 , wherein the method performed by the computer system operating according to the executed computer instructions further comprises re-preprocessing all data content associated with parents and children in the hierarchical relationship that have invalidated feature watermarks, the re-preprocessing including generating a new feature watermark for only parents and children in the hierarchical relationship that have invalidated feature watermarks, while parents and children in the hierarchical relationship having validated features retain current watermark features.
23. The non-transitory computer readable medium according to claim 22 , wherein the method performed by the computer system operating according to the executed computer instructions further comprises invalidating all feature watermarks in a sub-chain of the hierarchical relationship that emanate from the invalidated parent.