BPMN21 — Inheritance and Relationship of ResourceParameter

According to the class diagram (Figure 8.31) and the XML Schema, ResourceParameter inherits from BaseElement and has a relationship with cardinality [0..1] to ItemDefinition.

However, according to the last paragraph on page 96: The ResourceParameter element inherits the attributes and model associations of BaseElement (see Table 8.5)
through its relationship to RootElement. In addition, Table 8.50 defines no cardinality for the relationship type and, therefore, leads to the assumption that the cardinality is 1.

Suggestion: As the element Resource is also derived from RootElement, it would fit to also derive ResourceParameter from RootElement. Considering the cardinality, I would suggest to define a cardinality of [0..1].