Table 9.12 – Call Conversation Model Associations

NOTE: The ConversationNode attribute messageFlowRef doesn’t apply to Call Conversations.

9.5.5Global Conversation

A GlobalConversation is a reusable, atomic Conversation definition that can be called from within any

Collaboration by a Call Conversation.

The GlobalConversation element inherits the attributes and model associations and Collaboration (see Table 9.1), but does not have any additional attributes or model associations.

A GlobalConversation is a restricted type of Collaboration, it is an “empty Collaboration.”

A GlobalConversation MUST NOT contain any ConversationNodes.

Since a GlobalConversation does not have any Flow Elements, it does not require

MessageFlowAssociations, ParticipantAssociations, or ConversationAssociations or Artifacts. It is basically a set of Participants, Message Flows, and CorrelationKeys intended for reuse. Also, the

Collaboration attribute choreographyRef is not applicable to GlobalConversation.

9.5.6Conversation Link

Conversation Links are used to connect ConversationNodes to and from Participants (Pools -- see Figure 9.27). Conversation Links MUST be drawn with double thin lines.

A C o n v e r s a tio n L in k : th e c o n n e c tio n b e tw e e n a

P a r tic ip a n t a n d a

C o n v e r s a tio n N o d e

Figure 9.27 – A Conversation Link element

Processes can appear in the Participants (Pools) of Conversation diagrams, as shown in Figure 9.28. The invoicing and ordering Conversations have links into Activities and Events of the Process in the Order Processor. The other two Conversations do not have their links “expanded.” Conversation Links into Activities that are not Send or Receive Tasks indicate that the Activity will send or receive Messages of the Conversation at some level of nesting.

Sheduling Shipping

Customer

Figure 9.28 – Conversation links to Activities and Events

Figure 9.29 – Metamodel of Conversation Links related elements

The Conversation Link element inherits the attributes and model associations of BaseElement (see Table 8.5). Table 9.13 presents the additional attributes and model associations for the Conversation Link element.

Table 9.13 – Conversation Link Attributes and Model Associations

Conversation Links for Call Conversations show the names of Participants in nested Collaboration or global

Collaborations, as identified by ParticipantAssociations. For example, Figure 9.30 has a Collaboration on the left with a Call Conversations to a Collaboration on the right. The Conversation Links on the left indicate

which Participants in the called Collaboration on the right correspond to which Participants in the calling Collaboration on the left. For example, the Credit Agency Participants on the right corresponds to the Financial Company Participant on the left. ParticipantAssociations (not shown) tie each Participant in the Collaboration on the left to a Participant in the Collaboration on the right. They can be used to show the names of

Participants in nested Collaboration or global Collaborations.

Figure 9.30 – Call Conversation Links

9.5.7Conversation Association

A ConversationAssociation is used within Collaborations and Choreographies to apply a reusable Conversation to the Message Flows of those diagrams.

A ConversationAssociation is used when a diagram references a Conversation to provide Message correlation information and/or to logically group Message Flows. It is used when:

•A Collaboration references a Choreography for inclusion between the Collaboration’s Pools (Participants). The ConversationNodes of the Choreography (the inner diagram) need to be mapped to the ConversationNodes of the Collaboration (the outer diagram).