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151 results:

121. XQuery | Data model | Namespace nodes

Namespace nodes Namenspace nodes represent the namespaces known in the respective context. The textual value of a namespace node is the related URI. The typed value results from the textual…

122. XQuery | Data model | Node properties

Node properties As already described, a XML document in the XQuery data model is depicted as a tree of nodes. Each node has its own identity (not to be confused with…

123. XQuery | Data model | Functions on nodes

Functions on nodes The name of a node can be accessed with the XQuery functions fn:node-name() and fn:name(). If the node has no name (document nodes, comment nodes or…

124. XQuery | Data model | Overview of node functions

Overview of node functions The following table provides an overview of the so-called node functions. Some of the node functions can be called up without any argument. In this case, the function…

125. XQuery | Data model | Sequence types

Sequence types and node access functions In XQuery there are some constructs where it is necessary to indicate each expected type. For example, for a function definition the types of the…

126. XQuery | Data model | Node types

Node types Any node is represented by node(). In addition, it is possible to demand a certain node type, as for example a text node or an element node. The type can be defined even more…

127. XQuery | Data model | Node access functions

Node access functions One part of the sequence type syntax can also be used in path expressions in order to filter out some nodes from the sequence of the nodes which have been addressed by a…

128. XQuery | Data model | Type expressions

Type expressions XQuery introduces some expressions for dealing with types being unknown in this form in other languages. The type conversion for atomic types (cast as)…

129. XQuery | Data model | Type assignment

Type assignment Document nodes and element nodes can be explicitly validated against schema definitions with the validate instruction. ValidateExpr ::= validate SchemaMode? SchemaContext? {…

130. XQuery | Data model | Type query

Type query For the query of the type of a sequence value, XQuery provides the two expressions instance of and typeswitch. The excerpt from the grammar is as follows: InstanceofExpr ::=…

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