Then it creates an instance of the mainwindow class, shows it, and starts the Qt event loop: int main( int argc, char * argv ) The example's main() function creates the standard instance of QApplication. As you can modify the content of the instance editor, different instances can be tested and validation error messages analysed. A click on the 'Validate' button will validate the content of the XML instance editor against the schema from the XML schema viewer. You can select one of the three predefined XML schemas and for each schema an valid or invalid instance document. The UI consists of three parts, at the top the XML schema selection and the schema viewer, below the XML instance selection and the instance editor and at the bottom the validation status label next to the validation button. The UI for this example was created using Qt Designer: The user can select the valid or invalid instance document, change it and validate it again. The example application shows different XML schema definitions and for every definition two XML instance documents, one that is valid according to the schema and one that is not. The XML Schema Validation example shows how to use QtXmlPatterns to validate XML with a W3C XML Schema. xmlpatterns/schema/files/valid_order.xml.xmlpatterns/schema/files/valid_contact.xml.xmlpatterns/schema/files/invalid_recipe.xml.xmlpatterns/schema/files/invalid_order.xml.

xmlpatterns/schema/files/invalid_contact.xml.

Best xml editor and validator