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Glossary - X
XSD - XML Schema
An XML Schema provides a means for defining the structure, elements, attributes, content and semantics of XML documents; it expresses a set of rules to which each document based on that schema must conform in order to be a valid instance of the schema. Each XML Schema instance can also be referred to as an XML Schema Definition (XSD). XML Schemas are the successors to DTDs. METS is an example of an XML Schema. For more information, see the W3C Schools XML Schema tutorial.
