Re: Understanding PowerLoom's upper ontology

On Aug 2, 2007, at 5:43 PM, Thomas Russ wrote:

>
> On Aug 2, 2007, at 4:17 PM, Cameron Ross wrote:
>
>> I need to understand PowerLoom's upper ontology so that I can
>> construct a representation of it using CLIF.  I'm not versed in
>> Stella and have primarily been analyzing the PL-KERNEL-KB module
>> through the Ontosaurus website (http://blackcat.isi.edu:8950/ploom/
>> shuttle.html).  I have the following questions based on my
>> investigations to date:
>> Ontosaurus reports that the PL-KERNEL-KB module contains 28
>> concepts, 121 relations and 42 instances.  However, I count 122
>> relations (see attached file).  Is this an "off by 1" counting error?
>
> I'll have to investigate this.  I'll answer tomorrow.
>
> The short answer is that the numbers were meant to be representative
> of the size and not necessarily definitive.  I will take a look and
> give a better answer tomorrow.

The short answer is that we take an efficiency shortcut in producing  
the statistics that makes it easier to exclude items that are not  
defined in the module in question.  Normally this works fine, but  
there is one internal class with slots, where the slots aren't found  
and counted by the statistics generator, but the associated functions  
are present in the extension of the RELATION and FUNCTION classes.

This should only affect the numbers in a small way for the PL-KERNEL- 
KB, so I don't expect that we will be changing this.