Knowledge graphs are spreading everywhere: from Airbnb and eBay to Alexa, and from using JSON-LD on the web for better SEO to leveraging taxonomy to define AI. Combining knowledge graphs and machine learning, benchmarking graph databases, and W3C initiative for interoperability is shaping up. January 2019 was a lively month in the graph landscape.
The Semantic Zoo - Smart Data Hubs, Knowledge Graphs and Data Catalogs by Kurt Cagle is a brief history of semantics and knowledge graphs, context, and how to leverage it, as well as some key architectures in the semantic space: knowledge graphs, smart data hubs, semantic data catalogs, metadata managers and smart contracts.