Due to the rapid development of the Internet of Things (IoT) and consequently, the availability of more and more IoT data sources, mechanisms for searching and integrating IoT data sources become essential to leverage all relevant data for improving processes and services. This paper presents the IoT search framework IoTCrawler. The IoTCrawler framework is not only another IoT framework, it is a system of systems which connects existing solutions to offer interoperability and to overcome data fragmentation. In addition to its domain-independent design, IoTCrawler features a layered approach, offering solutions for crawling, indexing and searching IoT data sources, while ensuring privacy and security, adaptivity and reliability. The concept is proven by addressing a list of requirements defined for searching the IoT and an extensive evaluation. In addition, real world use cases showcase the applicability of the framework and provide examples of how it can be instantiated for new scenarios.

中文翻译：

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搜索物联网的挑战和解决方案

由于物联网（IoT）的快速发展，因此，越来越多的IoT数据源的可用性，搜索和集成IoT数据源的机制对于利用所有相关数据来改善流程和服务变得至关重要。本文介绍了物联网搜索框架IoTCrawler。IoTCrawler框架不仅是另一个IoT框架，还是一个连接现有解决方案以提供互操作性和克服数据碎片的系统系统。除了其独立于域的设计外，IoTCrawler还具有分层方法，可为IoT数据源进行爬网，索引和搜索，同时确保隐私和安全性，适应性和可靠性。通过解决为搜索物联网定义的要求列表和广泛的评估，证明了该概念。