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    This seems very specific to a particular (unknown?) system. I had to dig around to find out what ‘attribute’ means in this context and it didn’t really make things much clearer.

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      It’s designed to be the opposite of that — completely generic all-encompassing guide on migrating any kind of data in relational and semi-relational environment.

      Attribute here is any piece of data about a certain thing. (Basically: name of the user, text of the post, price of the item, etc.) In relational database this is often just a field in the table, but there are several other commonly accepted physical realizations, like key-value storage, schemaless etc.

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        Update: terminology is explained in the very first issue (which may be hard to find): https://minimalmodeling.substack.com/p/introduction-to-schema-migrations