Re: object algebra

> > Is the below table what you had in mind?
> >
> > T_Flow
> > Src Dest
> > A B
> > B C
> > C A
>
> Sure, that works.

The result of the below sentences is posted at www.xdb1.com/Example/Ex106.asp

node isa thing.

A isa node.
B isa node.
C isa node.

src isa thing.
* isa src. (* implies an unnamed instance) it isa A. (it refers to the node currently selected in the tree) * isa src.
it isa B.
* isa src
it isa C.

dest isa thing.
* isa dest.
it isa A.
* isa dest.
it isa B.
* isa dest.
it isa C.

flow isa thing.
* isa flow.
it is src/A. (this syntax is not available, must use GUI) it is dest/B.

• isa flow. it is src/B. it is dest/C.
• isa flow. it is src/C. it is dest/A.

Another example posted at www.xdb1.com/Example/Ex102.asp is similar. Received on Sun Feb 29 2004 - 05:15:04 CET