BPMN21 — Page 139. Ambiguous multiplicities of associations

Table 9.14. Row “innerConversationNodeRef”.

In table 9.14 the multiplicity of model association “innerConversationNodeRef” is [0..1], but in Figure 9.31 (p. 139) its multiplicity is [1..1].
Its description in Table 9.14 (“This attribute defines the ConversationNodes of the referenced element...”) suggests that its multiplicity should be [0..*].

The multiplicity of “innerConversationNodeRef” should be clearly defined ([0..1], or [1..1], or [0..*]). In case of [0..*] the model association name should be changed to “innerConversationNodeRefs”
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Table 9.14. Row “outerConversationNodeRef”.

In table 9.14 the multiplicity of model association “outerConversationNodeRef” is [0..*], but in Figure 9.31 (p. 139) its multiplicity is [1..1].
Its description in Table 9.14 (“This attribute defines the ConversationNodes of the parent element...”) suggests that its multiplicity should be [0..*].

The multiplicity of “outerConversationNodeRef” should be clearly defined ([1..1], or [0..*]). In case of [0..*] the model association name should be changed to “outerConversationNodeRefs”

Table 9.14 and Figure 9.31 should be updated accordingly.