Frequently Asked Questions about Schemas

The following list includes frequently asked questions about schemas.

What is the difference between a declaration and a definition?

What is the difference between XML Schema (XSD) and XDR schema?

What is the difference between a declaration and a definition?

Declarations describe the content models (structure) of elements and attributes inside XML document instances. Definitions create new data types (simple and complex types).

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What is the difference between XML Schema (XSD) and XDR schema?

The XML Schema definition language (XSD) is the current World Wide Web Consortium (W3C) specification for XML schemas. XML-Data Reduced (XDR) schema is an interim schema language offered to developers while the W3C worked on a draft implementation. MSXML 4.0 supports both XML Schema (XSD) and XDR schema.

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