The validator checks for well formedness first, meaning that your XML file must be parsable using a DOM/SAX parser, and only then does it validate your XML against the XML Schema.The validator will report fatal errors, non-fatal errors and warnings.Validates the XML string/file against the specified XSD string/file.
See also: Robin Cover's index of XML Schema materials.
XML Schema 1.1 (in two parts) is a W3C Recommendation.
Additional features include XML and Schema Validation, standard editing features, XSD Schema building and more.
XMLFox XML/XSD editor is the Windows based graphical tool for authoring, updating, exploring, well-formedness checking or validating XML documents.
If you want to make a sample XML file for testing from given XSD schema file, you could spend anything from a few minutes to a few hours manually analyzing and converting XSD to XML (and be bored to tears).
Or you could use this online tool and spend just a few seconds to do it automatically!!!
The XML Schema Working Group is closed, having completed its work successfully.
The specifications are now maintained by the W3C XML Core Working Group.
All XML documents must be well-formed, but it is not required that a document be valid unless the XML parser is "validating", in which case the document is also checked for conformance with its associated schema.