An acquisition ontology is proposed for the knowledge engineer to acquire d
omain knowledge for requirement analysis. It includes an acquisition librar
y, which contains basic acquisition components, and acquisition support ent
ities, which contain construction and acquisition instructors. The construc
tion instructors work with the acquisition library, with the help of method
ical knowledge, to construct domain-specific acquisition structures. The ac
quisition instructors then interpret the acquisition structures to extract
domain knowledge. This approach allows the user to easily acquire specific
domain knowledge for requirement analysis. It relieves burdens of the knowl
edge engineer to select different KA tools for and applying them to differe
nt domains. Moreover, the generated domain knowledge can be coupled with ap
propriate methodical knowledge to form a domain-specific RA tool to ease th
e work of requirement analysis. Finally, the ontology can be enhanced readi
ly, since it is designed as an open architecture, which helps us to evolve
it by assimilating new knowledge acquisition techniques. (C) 2000 John Wile
y & Sons, Inc.