Towards Logic Programming as a Service: Experiments in tuProlog

In this paper we explore the perspective of Logic Programming as a Service (LPaaS), with a broad notion of “service” going beyond the mere handling of the logic engine lifecycle, knowledge base management, reasoning queries execution, etc. In particular, we present tuProlog as-a-service, a Prolog engine based on the tuProlog core made available as an encapsulated service to effectively support the spreading of intelligence in pervasive systems—mainly, Internet-of-Things (IoT) applications scenarios. So, after recalling the main features of tuProlog technology, we discuss the design and implementation of tuProlog as-a-service, focussing in particular on the iOS platform because of the many supported smart devices (phones, watches, etc.), the URL-based communication support among apps, and the multi-language resulting scenarios.