As part of our work to "examine the feasibility of approaches to improve the consistency with which repositories share material", we are looking at this in regard to 3 areas: metadata (this idea), the materials themselves and descriptions of repository policies (e.g. on IPR) [materials and policies appear as separate ideas].
It would be nice if our repo-communication protocols provided for metadata correction. Aggregators like OAIster and NSDL do a lot of data-massaging, but that doesn't benefit source repos because the agg can't tell the source that its metadata was bad but can be fixed. In fact, OAI-PMH doesn't even let an agg say "your XML isn't well-formed and I won't take it until it is."
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