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    <p>I don't know the best way to do this, because it sounds like something that has already been implemented by others. If I were asked to implement this feature, I would recommend buying a wheel instead of reinventing it.</p> <p>Perhaps there are reasons you have to invent your own? If so, then you should add those reasons to the requirements you listed.</p> <hr> <p>If you absolutely must be this generic, I still recommend buying a system that has been architected for this requirement. Not just the storage requirements, which are the least of the problems your customer will have; but also: how do you keep the customer from screwing up totally when given this much freedom. Some of the commercial systems already meet this challenge without going out of business because of customers messing up.</p> <p>If you still need to do this on your own, then I suggest that your requirements (or perhaps those of another vendor?) must include: allow the customer to get it right, and help keep the customer from getting it wrong. You'll need some sort of UI to allow the customer to define these business objects, and the UI should validate the model that the customer builds.</p> <p>I recommend a UI that works at a conceptual level. As an example, see <a href="http://www.ormfoundation.org/files/folders/norma_the_software/default.aspx" rel="nofollow noreferrer">NORMA</a>, a Visual Studio add-in for Object-Role Modeling (the "other" ORM). Consider it as a example only, if your end users cannot afford a Visual Studio Standard license. Otherwise, you'll find that it is extensible, already produces many types of artifact (from SQL in various dialects to code), and will validate the model to see that it makes sense. End users would also be able to enter sample data that they believe should be valid, and the system will validate the data against the model.</p> <p>If your customers are producing sensible (if dynamic) business objects, then the question of storage will be much simpler.</p>
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    1. USJohn Saunders
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    1. COjohn - thanks for providing at least a considered and non sarcastic answer, something you wouldnt think too difficult. something i didnt make clear, users are NOT free to do anything they like - object creation will of course be through a UI and several layers of validation and abstraction from the database. my customers ARE 'producing sensible (if dynamic) business objects' - and how best to store these objects is exactly the question i was asking.
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    2. COThank you. I suggest you edit your question to say this. Otherwise, for the next several years, you'll be seeing new answers that say, "you're crazy". Also, may I presume there's a good reason why you have to do this yourself, and not base it on something commercial, like Siebel or salesforce.com?
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