Reference
XML Schema (XSD)
A formal definition of allowed XML structure and data types.
Explanation
Used for syntax validation (XSD validation).
Business rules go beyond XSD and check semantic constraints.
This article treats XML Schema (XSD) as a practical reference, not just a navigation page. It explains the term or workflow in context, shows why it matters for European e-invoicing, and connects the topic to invoice creation, validation, routing, archiving, and ERP implementation decisions.