PADL: A Modeling and Deployment Language for Advanced Analytical Services

• Published in: Sensors (Basel, Switzerland) Vol. 20; no. 23; p. 6712
• Main Authors: Díaz-de-Arcaya, Josu, Miñón, Raúl, Torre-Bastida, Ana I, Del Ser, Javier, Almeida, Aitor
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 24-11-2020; MDPI
• Subjects: Algorithms; analytical pipelines; Annotations; Artificial intelligence; artificial intelligence description language; Big Data; Complexity; edge computing; Flood control; Flood management; Geographical distribution; Heterogeneity; Infrastructure; Internet of Things; Language; machine learning life cycle; Pipelines; Quality of life; Sensors; Smart cities; Specification and description languages; Waste management; artificial intelligence description language; analytical pipelines; edge computing; machine learning life cycle
• ISSN: 1424-8220; 1424-8220
• DOI: 10.3390/s20236712

In the smart city context, Big Data analytics plays an important role in processing the data collected through IoT devices. The analysis of the information gathered by sensors favors the generation of specific services and systems that not only improve the quality of life of the citizens, but also optimize the city resources. However, the difficulties of implementing this entire process in real scenarios are manifold, including the huge amount and heterogeneity of the devices, their geographical distribution, and the complexity of the necessary IT infrastructures. For this reason, the main contribution of this paper is the PADL description language, which has been specifically tailored to assist in the definition and operationalization phases of the machine learning life cycle. It provides annotations that serve as an abstraction layer from the underlying infrastructure and technologies, hence facilitating the work of data scientists and engineers. Due to its proficiency in the operationalization of distributed pipelines over edge, fog, and cloud layers, it is particularly useful in the complex and heterogeneous environments of smart cities. For this purpose, PADL contains functionalities for the specification of monitoring, notifications, and actuation capabilities. In addition, we provide tools that facilitate its adoption in production environments. Finally, we showcase the usefulness of the language by showing the definition of PADL-compliant analytical pipelines over two uses cases in a smart city context (flood control and waste management), demonstrating that its adoption is simple and beneficial for the definition of information and process flows in such environments.