SysML1.x: MagicDraw/Cameo: The constraint property concept is (was) implemented using a vendor-specific stereotype extension ConstraintProperty [VENDOR-DEPRECATED]
SysML Parametrics: You can use custom stereotypes keywords «i» and «o» on constraint parameters to indicate their intended use (causality) as (i)nputs and (o)utputs on ConstraintBlocks
Figure 52 through Figure 57 show parametric diagrams for the source, amplifier, high-pass fil[t]er, low-pass filter, mixer, and sink, respectively. Source SysPhS-1.1
Binding connectors link constraint parameters to simulation variables and constants, indicating their values must be the same. Source SysPhS-1.1
Component parametric diagrams show properties typed by constraint blocks (constraint properties), as well as component and port simulation variables and constants. Source SysPhS-1.1
Constraint properties and their parameters also have their own notations ... Source OMG Systems Modeling Language (SysML) 1.6
Four general categories of properties of blocks are recognized in SysML: parts, references, value properties, and constraint properties. Source OMG Systems Modeling Language (SysML) 1.6
Part, reference, value, and constraint properties may be shown in block definition compartments with the labels "parts," "references," "values," and "constraints" respectively. Source OMG Systems Modeling Language (SysML) 1.6
Constraint properties are further defined in Clause 10. A port is another category of property, as further defined in Section 9. Source OMG Systems Modeling Language (SysML) 1.6
