Xpath context

[t.cimoli]

Hi all.
i have a question: xpath queries are allowed only in the current
context?
Every example i find seems so.
For example: i have to count the position of a child respect to its
siblings and i have a pointer to him, but i am in an other place on the
object tree. How can i use the standard query
(count(*[name()=$ObjName]/following-sibling::*) +1 )
on that child - whose pointer is stored under a variable ?-
Thank you everyone.

 

[David Carlisle]

Hi all.
i have a question: xpath queries are allowed only in the current
context?
Every example i find seems so.
For example: i have to count the position of a child respect to its
siblings and i have a pointer to him, but i am in an other place on the
object tree. How can i use the standard query
(count(*[name()=$ObjName]/following-sibling::*) +1 )
on that child - whose pointer is stored under a variable ?-
Thank you everyone.

If $x holds a node set then you can do

(count($x/*[name()=$ObjName]/following-sibling::*) +1 )

to count the following siblings of the child of $x whose name is
$onjName.

David

 

[t.cimoli]

Thank you. Now it works.