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FunctX XQuery Functions

functx:max-depth

The maximum depth of elements in an XML tree

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Description

The functx:max-depth function returns the maximum level of elements within a document, as an integer. 1 represents the root, 2 is a child of the root, etc. If $root is a document node, it is counted as a level. Text and other kinds of nodes are not counted as a level.

Arguments and Return Type

NameTypeDescription
$root node()? the root to start from
return value xs:integer?

XQuery Function Declaration

See XSLT definition.
declare namespace functx = "http://www.functx.com";
declare function functx:max-depth
  ( $root as node()? )  as xs:integer? {

   if ($root/*)
   then max($root/*/functx:max-depth(.)) + 1
   else 1
 } ;

Examples

let $in-xml :=
<authors>
   <author>
      <fName>Kate</fName>
      <lName>Jones</lName>
   </author>
   <author>
      <fName>John</fName>
      <lName>Doe</lName>
   </author>
</authors>
return
XQuery ExampleResults
functx:max-depth($in-xml)
3
functx:max-depth($in-xml/author[1])
2

See Also

functx:depth-of-nodeThe depth (level) of a node in an XML tree

History

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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