<https://www.electro-tech-online.com/threads/looking-for-a-schematic-for-a-spark-generator.3679/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.electro-tech-online.com/threads/looking-for-a-schematic-for-a-spark-generator.3679/>