From: Eric Armstrong <eric.armstrong@eng.sun.com>
Paul Fernhout wrote:
> From: Paul Fernhout <pdfernhout@kurtz-fernhout.com>
>
> William Kent wrote an excellent book around 1978 called "Data &
> Reality".
Unfortunately, the appears not to be available. (Amazon doesn't even
offer to look for it in the used shops -- they used to. Either they've
discarded that feature or this book *really* isn't available. I'll have
to rely on the links you sent.
> Near the end of the book, Kent suggests an abstract model called ROSE
> for Relation, Object, String, and Executeable. [He also calls it STAR
> for Strings, Things, and Relations.]
> One big drawback for the ROSE system is it is so flexible, that the
> integrity of the data rests very heavily on the code that manipulates
> it or which maintains it.
That could be a drawback. I wonder if there is a way around it.
> Let me provide an example ...
> where, "represents", "works-at", and "is-called" are also abstract
> nodes
> like
> node1246 represents "works-at"
This part really got my attention. One of the difficulties in building a
nutritional model with the tools I had available was encoding the
possible relations.
Question: How does one tie an executable to a particular relation so
that it can become a quantifiable part of model? As an example from that
domain (since I'm familiar with it), I'd like to express relationships
like the following:
(general) The B-vitamins require the B-vitamin folacin for
adsorption.
(specifics) Vitamin B-1 requires folacin for adsorption.
Vitamin B-2 requires folacin for adsorption.
...etc. (naming all the B-vitamins)
(quantity) For each B-vitamin, amt_absorbed = folacin_amt
(quantity) FDA-imposed folacin limit = 400 micrograms per supplement
(model) B-vitamin_amt - folacin_amt => waste_amt
Rather than giving a detailed reply, I guess I'm interested in a summary
statement of how much of the above can be modeled.
* Can we model the abstract statement with associated specific
statements?
* Can we model the quanitity relationships?
* Can we turn those quantity relationships into a usable model?
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This archive was generated by hypermail 2.0.0 : Tue Aug 21 2001 - 18:56:38 PDT