SYSML11 — 08 Blocks, 8.3.2.9 Unit, 8.3.2.10 ValueType

Suggest Unit and ValueType both extend abstract DimensionedType, and inherit a 'dimension' attribute This strategy provides a compact and elegant metamodel for units and values, and expresses well the underlying physical and mathematical principles of a dimensioned quantity represented by a value subject to chosen units. Value properties can then be sensibly typed by either a Unit or a ValueType. In the case where a ValueType has a Unit, the constraint still applies that the dimension of the ValueType must be the same as the dimension of the Unit. See also analysis image and commentary at: http://school.nomagicasia.com/node/126

Disposition: See issue 12219 for disposition