<https://forum.tzb-info.cz/150926-navrh-a-regulace-soustavy-fotovoltaika-a-plyn>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forum.tzb-info.cz/150926-navrh-a-regulace-soustavy-fotovoltaika-a-plyn>