Serialization of XDMDavid Carlisle davidc at nag.co.uk
Tue Sep 15 03:45:48 PDT 2009
> is it important that > $a/foo/bar is $a well it's inportant if the next process in the pipeline needs to do any kind of query processing, which is presumably the point of wanting to pass an xdm instance in the first place. if the sequence appears to the next process as $input then something as simple as count($input//bar) is going to give different answers depending on whether identity is preserved. But in practice it's probably only important to know what the answer is (whether identity is presrved or not) if you pass xml between processes by serialising and reparsing then typically you end up with new identities as far as xdm is concerned but this is rarely a problem in practice. so if the specification of the serialisation were to specify that you were serialising a _copy_ of any XDM instance, so in particular every item of the sequence always gets a new identity I think that would be OK for the vast majority of cases. David ________________________________________________________________________ The Numerical Algorithms Group Ltd is a company registered in England and Wales with company number 1249803. The registered office is: Wilkinson House, Jordan Hill Road, Oxford OX2 8DR, United Kingdom. This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. ________________________________________________________________________
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