Name
position — Returns the context position from expression evaluation context.
Synopsis
number
position
(
|
void); |
Description
Context position is the number of nodes in the node-set where the context node comes from. For the most popular case, when position() is used inside a predicate, and the predicate relates to some axis of the path, position() is the number of calls of the predicate, including the "current" call which is in progress when the function is called. Thus, context position cannot be greater than context size.
Return Types
Positive integer.
Examples
Example 24.609. Explicit call of position() inside a predicate
For every waybill, find the last <address> child inside the <waybill> element.
//waybill/address[position() = last()]
Example 24.610. Implicit call of position() inside a predicate
For every article, find up to three first paragraphs of the first section.
//article/section[1]/paragraph[position()<=3]