Hi,

I think that it's not difficult to program what you want in Jena. Also, Protégé is like a black box that we can't determine how it really works (it's based on OWLApi).

Good luck.

Syamili, take a look at Active Ontology tab. In the right there is a table with ontology metrics (number of axioms, classes and individuals.

I agree with Vinicius, Protege 4.* has an ontology metrics tab. And if it's not visible (I think it's not visible in the default setup), you can make it appear through Window > Views > Ontology Views > Ontology Metrics.

Thank you so much Vinicius Maran for your timely reply. 

Thank you so much Efstratios Kontopoulos for helping me to locate it. I am using Protege 4.3. and it was not visible in its default version. 

Thank you Benammar Riyadh for your time and consideration.

For this, you don't need any plug-in. Through SPARQL query formulation , u can also get them.

Thanks a lot Anindya!

I got it via ontology metrics tab. Actually I don't have strong base SPARQL queries. I think it is difficult to understand for beginner like me. Anyway thank you so much.

syamili , I found this book (http://www.learningsparql.com/ ) is very helpful to understand SPARQL for beginners. 

Thank you Anindya for the suggestion. I got  a free copy of the book from the link http://it-ebooks.info/book/2574/.

Thank you so much once again.