goal modelling requirement patterns software requirements definition software engineering specification elicitation patterns istar oss non-functional requirements software architecture gessi risk assessment i* interoperability open source software industry-academia collaboration web service specialization inheritance tools rest web services json xml istarml validation modeling language empirical monitoring soc ecosystems sla openexpo day 2015 gestion riesgos gestion riesgos; oss; open source software mobility smartcity software ecosystem quality model risks model-driven development mdd nfr business strategy istar. metrics. agile methodologies istar. open source software. business strategies service context context hierarchy context model context ontology context taxonomy. service provisioning service consumption systematic literature review slr ontology likert scales statistics research academia industries lecture qos quality of service ecosystem modelling riscoss requirements engineering software patterns software requirement patterns requirements elicitation pabre system iso 9126
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