Definition files (XSDs) for terms that are data types

An XML Schema Definition (XSD) is a file format used to define the structure and data types of XML documents. Think of it as a blueprint: it specifies which elements and attributes are allowed, how they relate to each other, and what kind of data they should contain.

Using XSD files helps ensure that XML documents are consistent, complete, and correctly formatted. They also support validation, meaning they can be used to check whether a given XML file follows the expected structure—something that’s especially useful when exchanging data between systems.

The zipped files below contain one XSD file for each data type term, labeled as “datatype.” These files are typically used to include the specific types you need when creating entities. Terms labeled as “attribute” can then be applied using the appropriate data type definitions provided in the XSD files that will come soon.