Purpose: Human-centric characteristics of the end-users of software systems, such as
gender, age, emotions, personality, language, culture, and physical and mental …

Abstract iStar is a goal-based requirement modelling language, being used both in industrial
and academic projects of different domains. Often the language is extended to incorporate …

Modelling languages are frequently extended to include new constructs to be used together
with the original syntax. New constructs may be proposed by adding textual information …

Context: Safety-Critical Systems is a system whose failure or malfunction may lead to
damage or loss of life, destruction of property, loss of missions or environmental damage …

In spite of the expressiveness of the i* modelling language, in excess of 90 extensions have
been proposed in order to address specific concerns of some domains or development …

iStar is a popular goal-based modelling language that has been used in different domains.
The language has been extended to incorporate new constructs related to an application …

Many extensions have been proposed since the initial iStar version, in the 90's. We have
been analysing these extensions and proposing ways to support new ones. In previous …

[context] iStar has been extended to include constructs of a great number of application
areas by adding new symbols. We analyzed the existing iStar extensions in a Systematic …