mneme: (Default)
Joshua Kronengold ([personal profile] mneme) wrote in [personal profile] jducoeur 2012-11-23 07:27 am (UTC)

I guess the primary question is whether there are things where there's value in making -sure- an attribute only appears once in a given object. The two uses (keeping in mind that I'm not sure what the problem domain for Querki is) that come to mind are unique IDs (where even if they're a secondary key, there are often good reason not to allow a given object to have more than one -- for instance, letting traversal work properly) and for linear data structures, next/previous.

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