Fifth International Conference on Advances in Databases, Knowledge, and Data Applications (DBKDA 2013), Seville, Spain, January 2013
Abstract. Evo-graph is a model for data evolution that encompasses multiple versions of data and treats changes as first-class citizens. A change in evo-graph can be compound, comprising disparate changes, and is associated with the data items it affects. In previous papers we have shown that recording data evolution with evo-graph is very useful in cases where the provenance of the data needs to be traced, and past states of data need to be re-assessed. We have specified how an evo-graph can be reduced to the snapshot holding under a specified time instance, we have given an XML representation of evo-graph called evoXML, and we have presented how interesting queries can be answered. In this paper, we explain how evo-graph is used to record the history of data and the structure of changes step by step, as the current snapshot evolves. We present C2D, a novel framework that implements the concepts in the paper using XML technologies. Finally, we experimentally evaluate C2D for space and time efficiency and discuss the results.