Using Xquery functions #340

RibeyeOnTheBone · 2026-01-07T15:04:13Z

RibeyeOnTheBone
Jan 7, 2026

I am a total newbee to Xquery. My first attempt is to output a pretty print of the current node, for debugging,

I have tried many variations, below is one.

This runs, but

How to output e.g.
$a
. Add in the <> causes it to fail
This Xquey 1.0? Is there a simple way to get to latest version?
Are there some examples on the site? I can only find Xpath example.

Many thanks

<!doctype html>

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@jinntec/fore@latest/resources/fore.css">
<script type="module" src="https://cdn.jsdelivr.net/npm/@jinntec/fore@latest/dist/fore.js"></script>

gc1 gcb gcc

  <fx-function signature="myHello($element as element()) as xs:string" type="text/javascript">
    return "Hello from myHello"
  </fx-function>
  <fx-function signature="xquery($element as element()) as element()*" type="text/xquery">
    let $a := concat("ROOT: ", $element/name())
    for $child in $element/*
    return
      <table>
        <tr>
          <td>
            $a
          </td>
        </tr>
      </table>
  </fx-function>

</fx-model>
<fx-inspector open="true"></fx-inspector>
<p>Test</p>

<p>BEFORE .</p>
<fx-output ref="."></fx-output>
<p>AFTER</p>
<p>BEFORE hello</p>
<fx-output ref="local:myHello(.)"></fx-output>
<p>AFTER</p>
<p>BEFORE xquery</p>
<p>
  <fx-output ref="local:xquery(.)"></fx-output>
</p>
<p>AFTER</p>

DrRataplan · 2026-01-07T15:08:15Z

DrRataplan
Jan 7, 2026
Maintainer

Hello there!

It's XQuery 3.1, using FontoXPath under the hood (https://github.com/FontoXML/fontoxpath). I suspect you will need some HTML escaping, can you try to replace the < with < and > with >?

KR,
Martin

0 replies

joewiz · 2026-01-07T15:31:28Z

joewiz
Jan 7, 2026

@RibeyeOnTheBone In your return clause, change:

          <td>
            $a
          </td>

... by wrapping the inline expression with curly braces—to ensure $a is evaluated as an expression rather than treated as a literal string:

          <td>
            { $a }
          </td>

Also, it appears some of the code samples in your post may've been dropped by GitHub's Markdown processor. Could you review your post to surround any inline code with single backticks (e.g., `inline code`) and code blocks with triple backticks? For tips on this, see https://docs.github.com/en/get-started/writing-on-github/working-with-advanced-formatting/creating-and-highlighting-code-blocks.

0 replies

RibeyeOnTheBone · 2026-01-07T17:37:44Z

RibeyeOnTheBone
Jan 7, 2026
Author

Ah, some progress, many thanks.

Replace the < with < and > with > helped, see the code below.
For some strange reason the code below is outputting a "," between the three tables - cant find where they are coming from.
Using { $a } causes me to get nothing back, as I was getting before - as soon as I use { } the function fails. Which made me think in we are looking at Xquery v1, which we are not.

Dont I need {} to be able to create child / nested loops?

<!doctype html>
<html lang="en">


<head>
  <meta charset="UTF-8">
  <title>My test</title>

  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@jinntec/fore@latest/resources/fore.css">
  <script type="module" src="https://cdn.jsdelivr.net/npm/@jinntec/fore@latest/dist/fore.js"></script>

</head>

<body>
<fx-fore>
  <fx-model>
    <fx-instance>
      <data>
        <a>
          <aa>gc1</aa>
        </a>
        <b>
          <bb>gcb</bb>
        </b>
        <b>
          <cc>gcc</cc>
        </b>
      </data>
    </fx-instance>

    <fx-function signature="myHello($element as element()) as xs:string" type="text/javascript">
      return "Hello from myHello"
    </fx-function>
    <fx-function signature="xquery($element as element()) as xs:string" type="text/xquery">
      let $a := concat("ROOT: ", $element/name())
      for $child in $element/*
        let $b:= concat(" CHILD: ", $child/name())
        return
            concat("&lt;table&gt;&lt;tr&gt;&lt;td&gt;", $b, "&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;")
    </fx-function>

  </fx-model>
  <fx-inspector open="true"></fx-inspector>
  <p>Test</p>

  <p>BEFORE .</p>
  <fx-output ref="."></fx-output>
  <p>AFTER</p>
  <p>BEFORE hello</p>
  <fx-output ref="local:myHello(.)"></fx-output>
  <p>AFTER</p>
  <p>BEFORE xquery</p>
  <p>
    <fx-output ref="local:xquery(.)"></fx-output>
  </p>
  <p>AFTER</p>

</fx-fore>

</body>

</html>

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RibeyeOnTheBone Jan 7, 2026

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DrRataplan Jan 7, 2026 Maintainer

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RibeyeOnTheBone Jan 7, 2026 Author

RibeyeOnTheBone
Jan 7, 2026

DrRataplan
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RibeyeOnTheBone
Jan 7, 2026
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