In an evolving site there is a fair chance of adding/changing/deleting slots from a class. What are good practices with respect to these actions in Elephant? Are there specific steps that need to be taken to migrate data from an old class definition to a new class definition? Any gotchas one needs to be aware of?
BTW, I've read several emails about data migration going by, can someone please clarify what exactly "data migration" is? Is it migrating between stores, or different versions of a class? Yarek
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