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XQuery Reference

XQuery 1.0 and XPath 2.0 share the same data model and support the same functions and operators.

XQuery Functions

XQuery is built on XPath expressions. XQuery 1.0 and XPath 2.0 share the same data model and support the same functions and operators.

XPath Operators

XPath Functions

XQuery Data Types

XQuery shares the same data types as XML Schema 1.0 (XSD).

XSD String

XSD Date

XSD Numeric

XSD Misc

From http://www.w3schools.com (Copyright Refsnes Data)