Systems modeling language: Difference between revisions

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* SysML model management constructs support models, views, and viewpoints. These constructs extend UML's capabilities and are architecturally aligned with [[IEEE-Std-1471-2000]] (IEEE Recommended Practice for Architectural Description of Software Intensive Systems).

SysML reuses seven of UML 2's fourteen "[[nominative]]" types of [[diagram]]s,<ref>{{cite book

SysML reuses seven of UML 2's fourteen diagrams, and adds two diagrams (requirement and parametric diagrams) for a total of nine diagram types. SysML also supports allocation tables, a tabular format that can be dynamically derived from SysML allocation relationships. A table which compares SysML and UML 2 diagrams is available in the SysML FAQ.

|chapter=Annex A: Diagrams (normative)

|title=Unified Modeling Language 2.5.1

|series=[[Object Management Group |OMG]] Document Number formal/2017-12-05

|date=December 2017

|publisher=[[Object Management Group]] Standards Development Organization (OMG SDO)

|page=683

|url=https://www.omg.org/spec/UML/2.5.1/PDF

}}

</ref>

SysML reuses seven of UML 2's fourteen diagrams, and adds two diagrams (requirement and parametric diagrams) for a total of nine diagram types. SysML also supports allocation tables, a tabular format that can be dynamically derived from SysML allocation relationships. A table which compares SysML and UML 2 diagrams is available in the SysML FAQ.

Consider modeling an automotive system: with SysML one can use Requirement diagrams to efficiently capture functional, performance, and interface requirements, whereas with UML one is subject to the limitations of [[use case diagram]]s to define high-level functional requirements. Likewise, with SysML one can use Parametric diagrams to precisely define performance and quantitative constraints like maximum [[acceleration]], minimum [[curb weight]], and total [[air conditioning]] capacity. UML provides no straightforward mechanism to capture this sort of essential performance and quantitative information.

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=== OMG SysML ===

After a series of competing SysML specification proposals, a SysML Merge Team was proposed to the OMG in April 2006.<ref>[http://www.omg.org/docs/ad/06-03-01.pdf OMG document ad/06-03-01] {{Webarchive|url=https://web.archive.org/web/20081201130201/http://www.omg.org/docs/ad/06-03-01.pdf |date=2008-12-01 }}{{dead link|date=April 2024}}</ref> This proposal was voted upon and adopted by the OMG in July 2006 as OMG SysML, to differentiate it from the original open source specification from which it was derived. Because OMG SysML is derived from open source SysML, it also includes an open source license for distribution and use.

The OMG SysML v. 1.0 specification was issued by the OMG as an Available Specification in September 2007.<ref>{{cite web|url=http://www.omg.org/spec/SysML/1.0/PDF|title=OMG Systems Modeling Language (OMG SysML™), V1.0 |date=September 2007 |work=Object Management Group|access-date=2014-12-04}}</ref> The current version of OMG SysML is v1.6, which was issued by the OMG in December 2019.<ref>{{cite web|url = https://www.omg.org/spec/SysML/1.6/|title = About the OMG Systems Modeling Language Specification Version 1.6 |work =Object Management Group|access-date = 2020-01-14}}</ref> In addition, SysML was published by the [[International Organization for Standardization]] (ISO) in 2017 as a full [[International standard|International Standard]] (IS), ISO/IEC 19514:2017 (Information technology -- Object management group systems modeling language).<ref>{{Cite web|url=https://www.iso.org/standard/65231.html|title=ISO/IEC 19514:2017 - Information technology -- Object management group systems modeling language (OMG SysML)|website=ISO |language=en|access-date=2017-12-29}}</ref>