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A RESTful extension of OPC UA

: Grüner, S.; Pfrommer, J.; Palm, F.


Institute of Electrical and Electronics Engineers -IEEE-:
IEEE World Conference on Factory Communication Systems, WFCS 2015 : Communication in Automation, May 27-29, 2015, Palma de Mallorca, Spain
Piscataway, NJ: IEEE, 2015
ISBN: 978-1-4799-8244-8
4 S.
World Conference on Factory Communication Systems (WFCS) <2015, Palma de Mallorca>
Fraunhofer IOSB ()

RESTful interfaces are a wide-spread architecture style for webservice implementations and are built upon the resource-oriented approach to decentralized architectures (ROA). REST postulates a set of requirements that are not covered by the OPC Unified Architecture (OPC UA) communication protocol per se. We propose a set of simple extensions to the OPC UA binary protocol that enable RESTful communication. The evaluation shows an order of magnitude improvement in the use of communication resources for sporadic service requests. Additionally, RESTful OPC UA allows applications to profit from the advantages of the resource-oriented architecture style, such as caching and loose application coupling.