SYSML17 — Property types 'Four general categories of properties of blocks are recognized in SysML ...' does not cover FlowProperty

From SysML-1.6 8.3.1.2.1 Property types p.43 :

'Four general categories of properties of blocks are recognized in SysML: parts, references, value properties, and constraint properties. (See 8.3.2.4 for definitions of these property types.)'

Elsewhere 'parts' and 'references' are described as being typed by Blocks, but a FlowProperty typed by a Block is not typically listed in the corresponding compartments.

A FlowProperty need not be typed by a ValueType, and is not typically understood to be a value property so is not covered by 'value properties' (see however SYSML17-399).

The same issue arises on p.53 under 8.3.2.4 Block:

SysML establishes four basic classifications of properties belonging to a SysML Block or ValueType. A property typed by a SysML Block that has composite aggregation is classified as a part property, except for the special case of a constraint property. Constraint properties are further defined in Clause 10. A port is another category of property, as further defined in Section 9. A property typed by a Block that does not have composite aggregation is classified as a reference property. A property typed by a SysML ValueType is classified as a value property, and always has composite aggregation. Part, reference, value, and constraint properties may be shown in block definition compartments with the labels "parts," "references," "values," and "constraints" respectively. Properties of any type may be shown in a "properties" compartment or in additional compartments with user-defined labels.

Because FlowProperty can be typed by ValueType, Block or Signal it is not covered well by the above; every attempt to handle the cases applied to any of the above results in "definition whack-a-mole"