Why little usage of ObjectProperty

Hi all,

I'm new to SW and Ontology. I have read some ontologies but found that little ObjectProperty is used. In my opinion, ObjectProperty represents the relationship between concepts. It is very important in the model as well as in the real world. But in most ontologies, it is really hard to find customed ObjectProperty except for the subClassOf, hierarchy I mean.
So is ObjectProperty really unimportant?
I'm looking forward to your suggestions!

Regards,

                  Gong Cheng

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Gong Cheng
Department of Computer Science and Engineering
Southeast University, Nanjing, P. R. China
Phone:        +86-(0)25-83793235
Fax:          +86-(0)25-83794838
E-mail:       gcheng@seu.edu.cn
Address:      Department of Computer Science and Engineering
              Southeast University
              Nanjing 210096, P. R. China
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Received on Wednesday, 12 October 2005 07:32:34 UTC