Refine::getRefines (in ref : NamedElement) : AbstractRequirement [0..*] The query getRefines() gives all the requirements that are suppliers ("to"end of the concrete syntax) of a «Refine» relationships whose client is the element in parameter ... Source OMG Systems Modeling Language (SysML) 1.6
Refining requirements Gallery Tutorial TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo Section 16:01: Requirements engineering in SysML Slide kind SysML Requirement Diagram