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_at_objectmentorcom>
>>> 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.
Date: Thu, 8 Jun 2006 19:34:16 +0200
Message-ID: <2006060819341650878-unclebob_at_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 Object Mentor Inc. | blog: www.butunclebob.com The Agile Transition Experts | web: www.objectmentor.com 800-338-6716 |Received on Thu Jun 08 2006 - 19:34:16 CEST