Update for SysML v2. This version continues to expand the textual modeling subset with better packaging, specialization, and state machine support. Highlights since 7.2:

• Same-file package imports: membership imports (e.g. import Types::Sensor;) and wildcards (import Types::*;) with visibility, so types resolve across packages in one model file.
• Namespace-aware type resolution for qualified names (e.g. Types::Actuator) and imported usages in the generated C++ code.
• Parallel (orthogonal) regions in state machines.
• ref, abstract, and subsets on part and item usages, including collection views for abstract subsets.
• Feature redefinition with :>> / redefines on part and attribute usages.
• Package-level action definitions and package-scoped attributes; clearer action call conventions (:> specialization, abstract action checks).
• Improved part usage and scoped lookup when the same action name appears in multiple parts.

Import Example#

package Types {
    private import ScalarValues::*;
    part def Sensor {
        attribute reading : Real = 1.0;
    }
}

package Test {
    private import Types::*;
    private import ScalarValues::*;

    part def Probe :> Sensor {
        attribute label : Real = 10.0;
    }
}

Redefinition Example#

part def Engine;
part def ElectricEngine;

part def Vehicle {
    attribute speed : Real default 50.5;
    part engine : Engine;
}

part def SportsCar :> Vehicle {
    attribute speed :>> Vehicle::speed : Real = 120;
    part engine :>> Vehicle::engine : ElectricEngine;
}

Orthogonal Regions Example#

state def SM parallel {
    state RA {
        entry; then SA1;
        state SA1;
        state SA2;
    }
    state RB {
        entry; then SB1;
        state SB1;
        state SB2;
    }
}