All you have to do is use a parser that has DTD validation enabled: option, which loads the DTD and weaves attribute default values into the document.Again, no validation is performed unless explicitly requested.Otherwise, a message that describes the error is displayed.You can click on the links in the error message to jump to the node in the XML document where the error was found.It’s 2017 and you still prefer using XML(Extensible Markup Language) to JSON(Java Script Object Notation) for data-interchange? Everything you want to say about the trade-offs of either of them has been dealt with here.But there are still a lot of systems using XML today and I can assure you that it would still be the case X years from now.Note that errors of well-formedness (such as mismatched start and end tags), if such exist, are displayed prior to validation errors being displayed.So the button will be enabled only when a validation error is reached (that is, after alll well-formedness errors have been corrected).
Now, we are ready to validate our XML file against the XSD using either DOMDocument or XMLReader.
If you want to validate an XML document against a DTD that is not referenced by the document itself, you can use the keyword argument to parse from a file.
This also enables correct handling of include files from within the Relax NG parser.
The 'Grand Child3' element is invalid - The value 'ZZZ' is invalid according to its datatype 'GCType' - The Enumeration constraint failed.
package provides an API for XML documents validation.
lxml also provides support for ISO-Schematron, based on the pure-XSLT skeleton implementation of Schematron: There is also basic support for The parser in lxml can do on-the-fly validation of a document against a DTD or an XML schema.