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Home -> Community -> Usenet -> comp.databases.theory -> Re: Does Codd's view of a relational database differ from that ofDate&Darwin?[M.Gittens]
VC wrote:
> "Jan Hidders" <jan.hidders_at_REMOVETHIS.pandora.be> wrote in message
> news:UGiue.127257$mY2.7061611_at_phobos.telenet-ops.be...
>
>>vc wrote:
>>>But let's not sidetrack to XQuery, rather tell me what 'print' is in >>>Daplex without drawing analogies with XQuery. Just give a definition >>>if you please. >> >>The identity function. The print is only there to indicate that you >>produce a value, so you can simply translate it to the expression that >>produces that value if you makes sure that they are concatenated for each >>value that you iterate over.
The expression "for each x in e1 print e2" denotes "[ e2 | x <- e1 ]". Why do you think that apart from this there is some need to give a separate definition of "what print is in DAPLEX"?
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