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— XQuery 4 Reference Guide —

Basic and Primary Expressions

Type	Tamino XQuery	W3C XQuery Draft	Short Description
Basic and Primary Expression	`Expr`	`Expr`, `TreatExpr`	basic XQuery expressions
Basic and Primary Expression	`PrimaryExpr`	`PrimaryExpr`	basic XQuery primitive
Literals	`Literal`	`Literal`	numeric or string literal
Literals	`NumericLiteral`	`NumericLiteral`	numeric literal
Parenthesized Expressions	`ParenthesizedExpr`	`ParenthesizedExpr`	expression sequence enclosed in parentheses
Function Calls	`ElementNameOrFunctionCall`	`FunctionCall`	represent an element or call a function

Path Expressions and Sequence Types

Type		Tamino XQuery	W3C XQuery Draft	Short Description
Path Expressions		`PathExpr`	`PathExpr`	select nodes on a path
		`AbsolutePathExpr`	subsumed in `PathExpr`	select nodes on the absolute path
		`RelativePathExpr` *	`RelativePathExpr`	select nodes on the relative path
Steps		`StepExpr`	`StepExpr`	create and possibly filter a sequence of items
	with axes	`AxisStep`	`ForwardStep`, `ReverseStep`	create and possibly filter a sequence of nodes
		`Axis`	`ForwardAxis`, `ReverseAxis`	direction of movement on a path
		`AbbreviatedStep`	`AbbreviatedForwardStep`, `AbbreviatedReverseStep`	select context, parent, or attribute node using abbreviated syntax
	without axes	`NoAxisStep`	—	create and possibly filter node sequence on current axis
	others	`GeneralStep`	subsumed in `StepExpr`	create and possibly filter item sequence
	others	`StepQualifiers`	`Predicates`	restrict item sequence to those matching one or more predicates
Sequence Type Syntax		`SequenceType`	`SequenceType` (Draft of October 29, 2004)	specify the type of an XQuery value
Sequence Type Syntax		`ItemType`	`ItemType` (Draft of October 29, 2004)	specify the type of an item
Expressions on Sequence Types		`TreatExpr`	`TreatExpr` (Draft of October 29, 2004)	modify static type of operand
Node Tests		`NodeTest`	`NodeTest`	check if a node satisfies conditions on the kind or name
		`NameTest`	`NameTest`	select nodes by name or wildcard
		`Wildcard`	`Wildcard`	select nodes matching the principal node kind
		`KindTest`	`KindTest`	check the kind of node
		`ProcessingInstructionTest`	`ProcessingInstructionTest`	check for processing instruction nodes
		`CommentTest`	`CommentTest`	check for comment nodes
		`TextTest`	`TextTest`	check for text nodes
		`AnyKindTest`	`AnyKindTest`	check for any kind of node
		`AttributeTest`	`AttributeTest` (Draft of October 29, 2004)	check for attribute nodes
		`ElementTest`	`ElementTest` (Draft of October 29, 2004)	check for element nodes

Sequence Expressions

Type	Tamino XQuery	W3C XQuery Draft	Short Description
Constructing Sequences	`ExprSequence`	`ExprSequence`	construct a sequence of expressions
	`ParenthesizedExpr`	`ParenthesizedExpr`	expression sequence enclosed in parentheses
	`RangeExpr`	`RangeExpr`	construct a sequence of consecutive integers
Combining Sequences	`UnionExpr`	`UnionExpr`	combine node sequences
Combining Sequences	`IntersectExceptExpr`	`IntersectExceptExpr`	combine node sequences

Arithmetic, Comparison and Logical Expressions

Type	Tamino XQuery	W3C XQuery Draft	Short Description
Arithmetic Expressions	`AdditiveExpr`	`AdditiveExpr`	add or subtract numerical values
	`MultiplicativeExpr`	`MultiplicativeExpr`	multiply or divide numerical values
	`UnaryExpr`	`UnaryExpr`	negate numerical value of an expression
Comparison Expressions	`CompExpr`	`ComparisonExpr`	general comparison expression
	`GeneralComp`	`GeneralComp`	compare sequences
	`ValueComp`	`ValueComp`	compare single values
	`NodeComp`	`NodeComp`	compare two nodes
Logical Expressions	`OrExpr`	`OrExpr`	check if one or both of two expressions are true
Logical Expressions	`AndExpr`	`AndExpr`	check if both of two expressions are true

Constructors

Type	Tamino XQuery	W3C XQuery Draft	Short Description
Generic	`Constructor`	`Constructor`	constructor expression
Direct Constructors	`ElementConstructor`	`ElementConstructor`	construct an XML element
	`ElementContent`	`ElementContent`	define content of an element in construction
	`AttributeList`	`AttributeList`	create a list of attributes
	`AttributeValue`	`AttributeValue`	define value of an attribute in construction
	`AttributeValueContent`	`AttributeValueContent`	define value content of an attribute in construction
	`EnclosedExpr`	`EnclosedExpr`	evaluate a sequence of expressions
	`DirectCommentConstructor`	`DirCommentConstructor` (Draft of October 29, 2004)	construct an XML comment
	`XmlProcessingInstruction`	`DirPIConstructor` (Draft of October 29, 2004)	construct an XML processing instruction
Computed Constructors	`ComputedElementConstructor`	`ComputedElementConstructor`	construct an element by computing an expression
	`ComputedAttributeConstructor`	`ComputedAttributeConstructor`	construct an attribute by computing an expression
	`ComputedDocumentConstructor`	`CompDocConstructor`	construct a document by computing an expression
	`CompTextConstructor`	`CompTextConstructor` (Draft of October 29, 2004)	construct a text node by computing an expression
	`CompCommentConstructor`	`CompCommentConstructor` (Draft of October 29, 2004)	construct an XML comment by computing an expression
	`CompPIConstructor`	`CompPIConstructor` (Draft of October 29, 2004)	construct a processing instruction by computing an expression
FLWOR Expressions	`FLWORExpr`	`FLWORExpr`	iterate over a sequence of items
	`ForClause`	`ForClause`	bind variables by evaluating expression
	`LetClause`	`LetClause`	bind variables by evaluating expression
	`WhereClause`	`WhereClause`	filter intermediate results
	`OrderByClause`	`OrderByClause` (Draft of October 29, 2004)	order intermediate results

Conditional Expressions

Type	Tamino XQuery	W3C XQuery Draft	Short Description
Conditional Expression	`IfExpr`	`IfExpr` (Draft of October 29, 2004)	conditional expression based on `if`, `then`, and `else`

Order-Related Expressions

Type	Tamino XQuery	W3C XQuery Draft	Short Description
Sort Expressions	`SortExpr`	`SortExpr`	sort sequence of items
Sort Expressions	`SortSpecList`	`SortSpecList`, `SortModifier`	define ordering expression and sort direction

Modules, Prologs and Pragmas

Most of the following syntax constructs implement concepts added only recently to the XQuery specification draft. If not otherwise noted they follow the specification of October 29, 2004.

Type	Tamino XQuery	W3C XQuery Draft	Short Description
Modules	`XQueryModule`	`Module`	top-level XQuery syntax construct
	`MainModule`	`MainModule`	obligatory XQuery module with query body
	`LibraryModule`	`LibraryModule`	provide XQuery fragment to other modules
	`ModuleDecl`	`ModuleDecl`	identify library module
Prologs	`Prolog`	`Prolog`	create environment for query processing
	`DefaultCollationDecl`	`DefaultCollationDecl` (Draft of November 12, 2003)	declare a default collation
	`ModuleImport`	`ModuleImport`	import one or more library modules
	`NamespaceDecl`	`NamespaceDecl` (Draft of November 12, 2003)	declare a namespace
	`DefaultNamespaceDecl`	`DefaultNamespaceDecl` (Draft of November 12, 2003)	declare a default (function) namespace
	`VarDecl`	`VarDecl`	declare a variable in query prolog
	`FunctionDecl`	`FunctionDecl`	declare a user-defined function
	`UpdatingFunctionDecl`	—	declaration of an updating function
Pragmas	`Pragma`	`Pragma`	query processor directive
	`SerializationSpec`	XSLT 2.0 and XQuery 1.0 Serialization Specification (Draft of November 12, 2003)	specify serialization of query output
	`TaminoQPIExecution`	—	determine parameters of query execution
	`TaminoQPIExplain`	—	retrieve query execution plan
	`TaminoQPIInline`	—	use default inlining strategy for user-defined functions
	`TaminoQPIOptimization`	—	choose query optimization strategy

Update Expressions

Type	Tamino XQuery	W3C XQuery Draft	Short Description
FLWU Expression	`FLWUExpr`	—	perform one or more update operations
Updating Sequences	`UpdateSequence`	—	sequence of basic update expressions
	`UpdateExpr`	—	update expression
	`UpdateIfExpr`	—	conditional update expression
	`UpdatingFunction`	—	updating function invocation
	`InsertClause`	—	insert a node sequence at update position
	`DeleteClause`	—	delete node sequence
	`RenameClause`	—	rename the nodes of a node sequence
	`ReplaceClause`	—	replace a node

Version Declaration

Tamino XQuery	W3C XQuery Draft	Short Description
`VersionDecl`	—	specifies the version of the XQuery language — reserved for future use

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Syntax Constructs Ordered by Categories