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Subject: Typed keys
If an ID/IDREF replacement mechanism, is it sufficient to consider keys to be strings or do we need to give them a datatype that controls when they are considered equal? For example, <doc> <foo> <bar>1</bar> ... </foo> <foo> <bar>01</bar> ... </foo> </doc> Suppose within doc, foo elements are uniquely identified by their bar children. Do we need to be able to say that bar is of type xsd:int and so that the above example is an error, because "1" and "01" are the same integer even though they are different strings? James
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