FunctX XQuery Function Library > XML Elements and Attributes > Modifying XML Attributes >

functx:copy-attributes

Copies attributes from one element to another

Description

The functx:copy-attributes function copies attributes from the element in $copyFrom to the element in $copyTo. It leaves all the original attributes and content of $copyTo, except that if $copyTo already has an attribute with the same name of one of $copyFrom's attributes, its value is updated to match $copyFrom.

Note: this function is intended to change the way elements and attributes appear in the results of a query, not to update them in an XML database. To update your XML database, you should use the implementation-specific update functions of your processor.

Arguments and Return Type

XQuery Function Declaration

declare namespace functx = "http://www.functx.com";
declare function functx:copy-attributes
  ( $copyTo as element() ,
    $copyFrom as element() )  as element() {

   element { node-name($copyTo)}
           { $copyTo/@*[not(node-name(.) = $copyFrom/@*/node-name(.))],
             $copyFrom/@*,
             $copyTo/node() }

 } ;

Examples

<in-xml>
   <a>123</a>>
   <b x="1" y="2">456</b>
   <c x="9">123</c>
   <d z="5">123</d>
</in-xml>

functx:copy-attributes(
   $in-xml/a, $in-xml/b)

<a x="1" y="2">123</a>

functx:copy-attributes(
   $in-xml/b, $in-xml/c)

<b x="9" y="2">456</b>

functx:copy-attributes(
   $in-xml/d, $in-xml/c)

<d z="5" x="9">123</d>

See Also

History