Demand-Side Platform calls Creative Tagging Provider to tag the Creatives that remain under its control. This is needed for Demand-Side Platform to be able to properly define its Demand-Side Inventory.
Demand-Side Platform and Demand-Side Agent are free to communicate in any way they choose, as this communication is not part of Adshares Protocol. Thus, any interactions between Demand-Side Platform and its Demand-Side Agent (e.g. notifications about Conversion Events) are not covered by Adshares Protocol.
Whereas the communication between Demand-Side Platform and its Ad Pay Module might be part of Adshares Protocol in case Ad Pay Module is externalized and delivered by a third-party Software Provider. If this is the case, Demand-Side Platform calls its Ad Pay Module to outsource to it the process of generating Payment Reports.