Re: RM and abstract syntax trees

On Nov 12, 10:36 pm, David BL <davi..._at_iinet.net.au> wrote:
> On Nov 13, 1:54 pm, Marshall <marshall.spi..._at_gmail.com> wrote:
>
> > What is the larger context in which you are still arguing
> > with me? What is the point you are trying to prove? I have
> > already made it quite clear that I see similarities between
> > pointers and foreign keys. Is there more? Because I don't
> > understand why this conversation keeps going on.
>
> I had missed your post on the 10th and when I cam across it today I
> disagreed with it, so I responded. Sorry! I actually find the matter
> quite boring. You are arguing as well so don't call the kettle
> black! I could just as easily ask you what you are trying to prove.

You didn't answer my question.

> > Your core dump example is inapplicable. Yes,
> > if you preserve *the entire address space* then pointer
> > values will still be valid. Which says nothing about
> > serializing object graphs, which is what *I* was
> > talking about.
>
> Serializing object graphs (as I interpret it) encompasses the special
> case of not translating pointer values.
>
> I thought your argument was this:
>
> Sending object graphs between processes (always)
> translates pointer values
> Sending relations between RDBs (never) translates
> key values
> Therefore there is a fundamental difference.
>
> Sorry to be up front but there is a flaw in that logic.

You didn't say what that flaw is.

> > If you want to merge two databases with different semantics,
> > you'll have to remap some of the values in the database. You
> > might have to do this with all kinds of values, not just keys.
> > The remapping of keys is just a particular (and not in any
> > way special) case of the fact that you have to have a new
> > unified semantics for the merged databases, and remap
> > the old ones into it. (Or you might keep the semantics of
> > one of them and just remap the other.) If you are not
> > merging two databases, then the remapping you bring
> > up is inapplicable. If you *are* merging databases,
> > then you have to do this remapping whether or not
> > you are serializing the database as well. So this point
> > says nothing about serializing databases.

You didn't respond to this argument.

Marshall Received on Tue Nov 13 2007 - 09:34:25 CET