Search for word tokens in a search string.

Related Syntax Constructs

The following construct(s) refer to this construct:

---

Syntax

ft:text-contains(node $node, string $searchString) => boolean

Description

This text retrieval function searches a node for a sequence of one or more word tokens (passed as a string). It returns true if all word tokens appear exactly in the order as specified in $searchString.

With ft:text-contains you can perform search operations including the use of a wildcard character. The section Pattern Matching in the XQuery 4 User Guide explains this in detail.

This function is bound to the namespace http://www.w3.org/2002/04/xquery-operators-text and you need to declare that namespace in the query prolog.

Arguments

$node	node in which the search takes place
$searchString	string containing a sequence of one or more words to be searched

Example

• Retrieve all patients who are responding to current treatment:

  declare namespace ft="http://www.w3.org/2002/04/xquery-operators-text"
  for $a in input()/patient
  where ft:text-contains($a/remarks, "responding to treatment")
  return $a/name

  You can rewrite this query using tf:containsText:

  for $a in input()/patient
  where tf:containsText($a/remarks, "responding to treatment")
  return $a/name