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Home -> Community -> Usenet -> comp.databases.theory -> Re: Demo: Modelling Cost of Travel Paths Between Towns
On Fri, 19 Nov 2004 04:41:42 GMT, Marshall Spight wrote:
(snip)
>> John // One and only representation of John
>> ->Mary ->likes ->John // A relation which does not metion John
>> // but refers to John.
>
>Okay, you are using a reference to John in place of John a second
>time. But you can't reuse that reference, because then you would be
>storing something, the reference, twice, which would be redundant
>according to your personal definition. So you can use something
>at most twice; once as the original and once as a reference. Bummer.
Hi Marshall,
No, there really is no such limit. You can also refer to the reference, then refer to the referernce to the reference, etc.
John
->Mary ->likes ->John ->Paula ->->likes ->->John ->->->John ->->->likes ->->Mary
Best, Hugo
-- (Remove _NO_ and _SPAM_ to get my e-mail address)Received on Fri Nov 19 2004 - 17:36:21 CST
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