Source and Target in Deliverables of Message

I am starting to explore modeling of services (using EA) and there are two folders to select deliverables for message - source and target. Alas, it is definetely not clear to me, what is meant by "which Deliverables are the source of the Message". Help me with interpretation and with an example of application if possible, please.

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Comments

  • Could it be, that source deliverable are dedicated to provide data, and resource delivereable are dedicated to receive data?