Structured Value Type

Sep 21

Sep 21 Structured Value Type

Value Types describe quantities and are used to type Value Properties. Value Types are grouped into three categories: primitive value types (e.g., Real, String, Boolean, Integer), Enumerated Lists of Enumeration Literals (e.g., {120V, 240V}), and structured value types. Structured value types describe a custom (and sometimes complex) data structure which can be used to type a value property.

The example describes a value type, called Vector, which has three attributes, xval, yval, and zval. This value type is used to type the velocityVector value property. The «block», My Block, uses a Javascript constraint to calculate the value of the derived value property, /magnitude, using the value of the structured value type, Vector.

Reference:

Friedenthal, S., Moore, A., & Steiner, R. (2012) A Practical Guide to SysML. Waltham, MA: Morgan Kaufmann. pg. 137.