| http://www.w3.org/ns/prov#value | - Based on these models the following types of marketplaces can be identified: [0094] 1) ???Centralised??? or ???Distributed??? marketplaces: (using centralised and de-centralised models) [0095] 1.1) Centralised model: In this type of model, the Agent Context consists of A+1 domain agents 24, one representing each entity, and an exchange agent 22.
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