Requirements modeling for system engineering using SysML, the Systems Modeling Language

In this paper we present the model supporting the Requirement diagram in the emerging standard SysML, the System Modeling Language. SysML is the extension to System Engineering of the Unified Modeling Language (UML) proposed by the SysML and recently accepted as a answer to the Request for Proposal from the Object Modeling Group (OMG). We explain the rationale behind the construct of the model and give several examples to illustrate its features.