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JavaScript xdmp.nodeReplace

xdmp:node-replace

xdmp:node-replace(
   $old as node(),
   $new as node()
) as empty-sequence()

Summary

Replaces a node.

Parameters
old The old node, to be replaced.
new The new node.

Usage Notes

Attribute nodes cannot be replaced by non-attribute nodes. Non-attribute nodes cannot be replaced by attribute nodes. Element nodes cannot have document node children. Document nodes cannot have multiple roots.

Example

(: create an XML document :)
  xdmp:document-insert("/example.xml",
    <a><b>bbb</b></a>);

(: replace the b node with a c node :)
  xdmp:node-replace(doc("/example.xml")/a/b, <c>ccc</c>);

(: look at the new document :)
fn:doc("/example.xml")
 =>
<?xml version="1.0" encoding="UTF-8"?>
<a><c>ccc</c></a>

Example

(: This example shows how to update the root
   node of a text format document.  Start by
   creating a text document.     :)

xdmp:document-insert("/mydir/doc.txt",
text{"This is a line of text."} ) ;

(: Update the text node of the text document
   by appending another line of text to the
   text node.  Note that the text node is the
   root node of a text document.     :)

xdmp:node-replace(doc("/mydir/doc.txt")/text() ,
text{ concat(doc("/mydir/doc.txt")/text(), "
This is another line of text.") } ) ;

doc("/mydir/doc.txt")
=>
This is a line of text.
This is another line of text.

Example

(: create a document :)
xdmp:document-insert("/foo.json", object-node {"foo":"this is a value"});
(: replace the value using xdmp:node-replace :)
xdmp:node-replace(fn:doc("/foo.json")/foo, text{"this is a different value"});
fn:doc("/foo.json")
=>
{"foo":"this is a different value"}

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