Tamino XML Server Version 9.7
 —  X-Query Reference Guide  —

Predicate

Select a node subset by using a predicate expression


Syntax

Predicate

[ PredicateExpr ]

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Description

You can use a Predicate in a location step or in a filter expression, both of which identify a node-set. This node-set is then restricted by applying the PredicateExpr can be used to filter a node set in a location step.

A predicate can either be a Boolean expression or a numeric expression. A numeric predicate [n] is short for [position()=n] which is true for all nodes that are the nth child element in the input node set. If the value of the predicate is not a number, then it is treated as a Boolean expression.

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Compatibility

It corresponds to the expression Predicate defined in XPath, Section 2.4, Rule 8.

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Examples

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Related Expressions

FilterExpr Step

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