Semweb's estimation of triple complexity not working 'out of the box'

Hi all,

Has anybody been using rdf_estimate_complexity/4? To me it seems does not
seem to work 'out of the box'.

For example:
~~~
?- use_module(library(semweb/rdf_db)).
?- rdf_assert(rdf:a, rdf:b, rdf:c).
?- rdf_estimate_complexity(_, rdf:b, _, C).
C = 0.
~~~

But then:
~~~
?- rdf(_, rdf:b, _).
?- rdf_estimate_complexity(_, rdf:b, _, C).
C = 1.
~~~

So it seems like rdf_estimate_complexity/4 need some 'warm-up' before it
becomes operational. I would like to know how I can guarantee that it works
(I have not yet found a way that works reliably).

---
Cheers!,
Wouter.

E-mail: [email protected]
WWW: www.wouterbeek.com
Tel.: 0647674624
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