This JATS4R validator will validate an XML document against the appropriate JATS DTD (NISO JATS version 1.0, 1.1 or 1.2), plus recommendations that have been published on the JATS4R website. The source code (MIT-licensed where applicable) is available for this user interface, the validator web service, the Schematron rules and the JATS DTDs. The XML content will be sent to...