Apache XMLBeans is an old tool but still functioning. Download and uncompress the latest binary release, then run inst2xsd under bin folder (needs JDK).
inst2xsd xxx.xml
How to Generate XSD Schema from XML?
23 April 2015
Apache XMLBeans is an old tool but still functioning. Download and uncompress the latest binary release, then run inst2xsd under bin folder (needs JDK).
inst2xsd xxx.xml