Which two statements about XML schema definition (XSD) files are correct?

XML Schema Definition (XSD) files are used to define the structure and data types of an XML document. They ensure that the XML document adheres to a specific structure by defining the allowed elements, attributes, and their data types, thereby enforcing a consistent format.

Option Ais correct because XSD files define the elements, attributes, and structure (hierarchy) of an XML document.

Option Dis correct because XSD files provide a standardized format, ensuring that all parties working with the XML document use the same set of tags and structure.

Option B (Every XML document must have an XSD file defined for it)is incorrect; not every XML document requires an XSD file, although it's beneficial for validation.

Option C (An XSD file is not an XML document)is incorrect because XSD files themselves are written in XML.

Supporting References:

W3C XML Schema Definition (XSD) Documentation:Explains the purpose and structure of XSD files, including their role in defining XML document schemas.