In literature, I found many approaches that deal with NFRs including Ontology based approach. I found issues related to ontology engineering viz. merging mapping, expressiveness, among others and issues in NFRs viz. conflict, integrity, etc. but I have some confusion regarding issues in ontology engineering in NFRs elicitation and specification. I am not clear what kind of issues regarding ontology in NFRs that we can consider as a challenging task for research work. Please provide your valuable guidance regarding this. Hopefully waiting for your reply. It will help me a lot.
Thanking you,