FunctX XQuery Function Library > XML Elements and Attributes > XML Document Statistics >

functx:max-depth

The maximum depth of elements in an XML tree

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

XQuery Function Declaration

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

<authors>
   <author>
      <fName>Kate</fName>
      <lName>Jones</lName>
   </author>
   <author>
      <fName>John</fName>
      <lName>Doe</lName>
   </author>
</authors>

functx:max-depth($in-xml)

3

functx:max-depth($in-xml/author[1])

2

See Also

History