Behaviour-driven development, DEMO methodology, user requirements, acceptance testing

Behaviour-driven development (BDD) methodology is the approach how to keep track of the user's requirements during the software development. The paper deals with utilization of DEMO methodology to improve accuracy of context given in BDD scenarios. Ontological nature of transactions described in DEMO methodology helps to focus on production and coordination acts and facts in order to support important company's business processes. Integration of transactions in the form of user stories into BDD scenarios sets their context of feature definition upon ontological description of business in its existential essence. Thanks to domain-specific languages like Gherkin, such a kind of BDD scenarios is also executable and applicable in an automation process of software development. The beneficial consequence is the fact that developers are introduced to essential business goals and implemented features directly correspond with activities performed by employees in companies.