Re: Storing data and code in a Db with LISP-like interface

From: mAsterdam <mAsterdam_at_vrijdag.org>
Date: Fri, 28 Apr 2006 09:00:56 +0200
Message-ID: <4451bda3$0$31656$e4fe514c@news.xs4all.nl>

Neo wrote:

>>person (john).
>>judge (john).
>>fruit (apple1).
>>fruit (tomato1).
>>vegetable (tomato1).
>>vegetable (broccoli1).
>>thing(X):-vegetable(X).
>>thing(X):-fruit(X).

>
>
>
> With respect to your comment that dbd's script looks like bitPlumbing,

Heh. I meant for bitplumbing to refer to my activity when extracting the prolog-clauses (when you did not like the term re-engineering for that activity). If a little extra verbosity brings benefits - and you claim it does - I see no harm there, espacially when I can generate the extras with some form of scripting most of the time.

> an alternate way of doing the above Prolog statements in dbd is:
>
> (createInst 'john' 'person' 'judge')
> (createInst 'apple1' 'fruit')
> (createInst 'broccoli1' 'vegetable')
> (createInst 'tomato1' 'fruit' 'vegetable')
>
> The createInst function's first parameter is the name for the new
> instance which is classified by the remaining parameters. If those
> classifications do not exist, they are automatically created and
> related as instances of thing. I haven't use this function in dbd
> scripts thus far as it obscures too many underlying relationships which
> makes it difficult for users to understand the queries later.

Ok - good to be verbose here; nice to know there is a shorter form. Received on Fri Apr 28 2006 - 02:00:56 CDT