_:b20610795	<https://schema.org/itemListElement>	"<a href=\"/en-US/docs/Web/HTML/Guides/Constraint_validation\" class=\"breadcrumb-current-page\" property=\"item\" typeof=\"WebPage\"><span property=\"name\">Constraint validation</span></a><meta property=\"position\" content=\"4\" />"^^<http://www.w3.org/1999/02/22-rdf-syntax-ns#XMLLiteral> .
_:b20610795	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<https://schema.org/ListItem> .
_:b20610795	<http://www.w3.org/2007/05/powder-s#describedby>	<http://dev.restore.ovi.cnr.it:8890/about/id/https/developer.mozilla.org/en-US/docs/Web/HTML/Guides/Constraint_validation> .