OMG Systems Modeling Language

This International Standard defines a general-purpose language for systems engineering applications, called the OMG Systems Modeling Language (OMG SysMLTM). Throughout the rest of this International Standard the language will be referred to as SysML.
SysML supports the specification, analysis, design, verification, and validation of a broad range of complex systems. These systems may include hardware, software, information, processes, personnel, and facilities.
It is common practice for engineers to use a wide range of modeling languages, tools, and techniques on large systems projects. SysML is intended to unify diverse modeling languages used by systems engineers and can be used with a wide variety of discipline- and domain-specific modeling languages.