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A definition or usage is specified as a variation by placing the keyword variation before its kind keyword. A variation is always abstract, so the abstract keyword is not used on a variation.

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Variability Examples: VehicleVariabilityModel.sysml: (1) packages and members overview
SysMLv2: Cameo 2026xHF2: Does not display «variation part» or «variant part» (just «part») [compare with figure SysML2.0 p.38]
Variability Examples: VehicleVariabilityModel.sysml: (2) 150% Model relational view
Variability Examples: VehicleVariabilityModel.sysml: (3) 100% Model relational view
SysMLv2: Cameo 2026xHF2: Does not list «variant part» subparts of a «variation part» in a compartment [WORKAROUND: Use drag n' drop of the full «variant part» feature symbol]
SysMLv2: Cameo 2026xHF2: Does not list «variant perform» subactions of a «variation perform» in a compartment [WORKAROUND: Use drag n' drop of the full «variant perform» feature symbol]
SysMLv2: Cameo 2026xHF2: Does not display «variation perform» or «variant perform» (just «perform» or «perform action»)
Source
OMG Systems Modeling Language TM (SysML®) Version 2.0 formal/2025-09-03 (Sep 2025)
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About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes
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A definition or usage is specified as a variation by placing the keyword variation before its kind keyword. A variation is always abstract, so the abstract keyword is not used on a variation.
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All usages declared within the body of a variation definition or usage are declared as variant usages by placing the keyword variant at the beginning of their declarations. Variant usages may only be declared within a variation.
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The kind of a variant usage must be consistent with the kind of its owning variation.
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