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Home -> Community -> Usenet -> comp.databases.theory -> Re: The wisdom of the object mentors (Was: Searching OO Associations with RDBMS Persistence Models)

Re: The wisdom of the object mentors (Was: Searching OO Associations with RDBMS Persistence Models)

From: Robert Martin <unclebob_at_objectmentor.com>
Date: Thu, 8 Jun 2006 19:34:16 +0200
Message-ID: <2006060819341650878-unclebob@objectmentorcom>


On 2006-06-01 13:07:48 +0200, "Dmitry A. Kazakov" <mailbox_at_dmitry-kazakov.de> said:

> On Thu, 1 Jun 2006 13:56:14 +0300, x wrote:
> 
>> "Dmitry A. Kazakov" <mailbox_at_dmitry-kazakov.de> wrote in message
>> news:12sh1oeeq72os$.1cm06guz61xq9.dlg_at_40tude.net...

>>> On Thu, 01 Jun 2006 01:48:55 GMT, J M Davitt wrote:
>> 

>>> It is strange to hear talks about identity from RM side. I thought RM
>>> overcame that disease. There is no identity. Files are same, neither is
>>> real. Paths aren't same. Identity is a relation, isn't it? Now if you'd
>>> consider objects like (path,file), these could have identity defined as
>>> id((path,file))=path.
>> 
>> File versioning anyone ?
> 
> My last one was RSX-11M (alas, I must say). The file version number was a
> part of the path there: DK1:[1,54]FILE.FTN;25, if I correctly remember...

VMS had it too. Very nice. Saved my butt any number of times.

-- 
Robert C. Martin (Uncle Bob)  | email: unclebob_at_objectmentor.com
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Received on Thu Jun 08 2006 - 12:34:16 CDT

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