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This proposal is based on the premis that changes to DSpace metadata characteristics must be backward comparable and retain the same functionality as previously existed to ease transitional transition for all existing users of the platform.  So many different functional areas of DSpace are reliant on existing metadata functionality , that it is criticial that any changes in functionality also have well defined and scripted updates across releases.  Thus another very critical feature of this proposal is that this new Schema model should support the above features without significant need to transform existing DSpace Item metadata nor the registry itself.  

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