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XQuery from the Experts: A Guide to the W3C XML Query Language by Philip Wadler, Jim Tivy, Jérôme Siméon, Michael Rys, Jonathan Robie, Michael Kay, Mary Fernández, Denise Draper, Don Chamberlin, Howard Katz - Editor

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Glossary

abstract syntax.

A term for the grammatical description of a language in which precedence relationships between the productions are ignored for the sake of simplicity. Such a description has fewer constraints than those specified by a concrete syntax.

anonymous type.

An unnamed type in XML Schema. The scope of the type is limited to the element or attribute within which it is defined. This is convenient for “one-off,” in-place type definitions that don't need to be reused.

atomic type.

An XML Schema simple type that is not a list type or a union type.

atomic value.

The value of an item in the value space of an atomic type.

atomization.

A type-conversion process used to convert certain types of expressions to a sequence of atomic values. ...

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