📖 XML Validation & Well-Formedness Rules Guide
Master XML validation principles, root element constraints, entity escaping, and schema verification.
Well-Formed XML vs Valid XML
An XML document is 'well-formed' if it follows basic XML syntax rules: a single root node, properly matching opening/closing tags, quoted attribute values, and correct element nesting.
A 'valid' XML document goes a step further by conforming to a specific Document Type Definition (DTD) or XML Schema Definition (XSD) schema rules.
Frequently Asked Questions
Detailed specifications & guides FAQs.