OO2relation mapping

Quick question for the skilled among you, Why I ask this: I am currently developing a object to relational mapping layer for PHP. It's NOT a simple treat all databases like one kind of layer (although it does involve it to preserve extensibility) but an XML based intermediate layer that creates both, table structures, following a conventional scheme and PHP classes that allow, OO access to these tables. I have enclosed the XML file that represents the intermediate layer. Its pretty readable even without the XML schema. I am currently under development, so don't expect anything useful in less than a few weeks Question: Does anyone of you know anyone who has tried something similar, because my research on the subject grows thin? Is something like this of public interest at all, or would you prefer accessing your datastructure the old fashion way? 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