如何在 cts:search 中使用 Marklogic 动态提供根元素

Question

After using the below mentioned Xquery I am getting the output correctly.

let $element :="Name"
let $value := "Antony"
let $op :=  cts:search(//root, cts:element-value-query( xs:QName($element),$value))
return $op

But I am getting error while using " root " value in variable. Please suggest me, if any other options?

let $element := "Name"
let $value := "Antony"
let $root := "root"
let $op := cts:search(//$root, cts:element-value-query( xs:QName($element),$value))
return $op 

Error :

[1.0-ml] XDMP-UNSEARCHABLE: cts:search(fn:collection()/descendant-or-self::node()/"root", cts:element-value-query(fn:QName("","Name"), "Antony", ("lang=en"), 1)) -- Expression is unsearchable

Stack Trace
At line 16 column 23:

In xdmp:eval("(:&#10; let $uri := cts:element-value-query( xs:QName(&quot;file...", (), <options xmlns="xdmp:eval"><database>8922589838473153050</database><root>/marklogic/poc/</r...</options>)

$element := "Name"
$value := "Antony"
$root := "root"

14. let $value := "Antony"
15. let $root :="root"
16. **let $op := cts:search(//$root, cts:element-value-query( xs:QName($element),$value))**
17. return $op 

Example data:

<root processtype="sample">
  <title series="hk">
    <Name>Antony</Name>
  </title>
</root>

Answer 1

you cannot use the $root value in that way.. in order to match the $root value you have to do the following //root[. = $root] //root[. = $root]

let $element :="Name"
let $value := "Antony"
let $root :="root"
let $op :=  cts:search(//root[. = $root], cts:element-value-query( xs:QName($element),$value))
return $op