XSD (XML Schema Definition)

An XSD (XML Schema Definition) is a blueprint that defines the structure and rules for an XML document. It specifies what elements and attributes can appear, their data types, and how they are ordered or nested. Think of it as a formal contract that ensures XML data is consistent and valid, making it easier to share, interpret, and process data between different systems. In essence, an XSD guides the creation of XML files, ensuring they conform to expected formats and rules.