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FunctX XQuery Functions


Removes attributes from an XML fragment, based on name



The functx:remove-attributes-deep function removes attributes from a sequence of elements and all of their descendants. The $names argument is a sequence of strings that represent attribute names to remove. Prefixes can (and must) be used in the $names values for attributes that are prefixed in the input documents. You can also specify wildcard values "*", "*:" and ":*" in the second argument. See the description for functx:name-test for details.

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

$nodes node()* the root(s) to start from
$names xs:string* the names of the attributes to remove, or * for all attributes
return value node()*

XQuery Function Declaration

See XSLT definition.
declare namespace functx = "http://www.functx.com";
declare function functx:remove-attributes-deep
  ( $nodes as node()* ,
    $names as xs:string* )  as node()* {

   for $node in $nodes
   return if ($node instance of element())
          then  element { node-name($node)}
                { $node/@*[not(functx:name-test(name(),$names))],
                  functx:remove-attributes-deep($node/node(), $names)}
          else if ($node instance of document-node())
          then functx:remove-attributes-deep($node/node(), $names)
          else $node
 } ;


let $in-xml-1 :=
<a attr1="123" attr2="456">
  <b attr1="xzy">abc</b>
let $in-xml-2 :=
<a xmlns:a="http://a" a:attr1="123" attr1="456">
  <b a:attr1="ghi" attr1="xzy">abc</b>
XQuery ExampleResults
<a attr2="456">
<a attr1="456">
  <b attr1="xzy">abc</b>

Depends On

functx:name-testWhether a name matches a list of names or name wildcards

See Also

functx:remove-attributesRemoves attributes from an XML element, based on name
functx:add-attributesAdds attributes to XML elements


Published OnLast UpdatedContributor(s)
2006-06-272007-02-26Priscilla Walmsley, Datypic, pwalmsley@datypic.com, http://www.datypic.com
Datypic XQuery Services

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