How to use an XML schema validator
An XML schema validator can be used during the development of an XML link. Parallel to creating an XML file, it's always recommended to already define the corresponding XSD validates, so the data can be validated during development.
In order to validate XML files according to an XSD definition, programmers usually use built-in routines in the application development environment to validate the XML. However, if the XML data requires to checked quickly, an online XML validator could be the answer.
An example of such a tool is schemavalidator.com that allows you to upload the XML source file and the corresponding XSD file to check straight away whether the XML data complies with the XSD validations.