This work presents a systematic approach to knowledge acquisition within the domain analysis context, which grants a well defined process for eliciting and representing domain information that is sensitive to the kind of knowledge to be explored. Within the domain analysis context, knowledge acquisition encompasses aspects that are similar to the ones found in Requirements Engineering, although it is necessary to identify, elicit, and register requirements that belong to a family of systems instead of a unique system. Besides domain requirements, every kind of information that is related to the given domain must be identified, elicited and registered, supporting its comprehension and future generation of applications.