Jarno van Driel is a true pioneer on the semantic web.

Even before you could add machine-readable semantic markup to webpages, he was discovering ways to help search engines understand what web pages were about. Much of that success grew out of his early focus on accessibility and usability.

When semantic markup was introduced, he was among the first cadre of experts on RDFa, Microdata, schema.org, and other semantic practices, and he is to this day one of the most respected practitioners of this craft.

https://ellessmedia.com/csi/jarno-van-driel/