Validate one or more XML documents against a Document Type Definition (DTD)

Validate XML documents.
More information: <http://xmlstar.sourceforge.net/docs.php>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

xml validate --dtd {{path/to/schema.dtd}} {{path/to/input1.xml|URI}} {{input2.xml ...}}

click the source code to copy install xml validate on any operating system with command-not-found.com