Reference to undeclared namespace prefix: 'json'. while renaming xml attibute with xslt

Question

Updated with Minimal, Complete and Verifiable information thanks @Kenneth for drawing my attention.

So, I'm trying to rename an xml attribute using xslt, but I keep getting this error message:

Reference to undeclared namespace prefix: 'json'.

This is my source xml:

<?xml version="1.0" encoding="utf-8"?>
<data>
  <code>SO000009</code>
  <businessPartner>70833A356B9A428CBDDCD2A76A49681F</businessPartner>
  <startDateTime>2018-01-25T15:24:27Z</startDateTime>
  <subject>Test</subject>
  <equipments jsonArray="true">80202</equipments>
</data>

This is how I want the xml to be:

<?xml version="1.0" encoding="utf-16"?>
<data xmlns:json="http://james.newtonking.com/projects/json">
  <code>SO000009</code>
  <businessPartner>70833A356B9A428CBDDCD2A76A49681F</businessPartner>
  <startDateTime>2018-01-25T15:24:27Z</startDateTime>
  <subject>Test</subject>
  <equipments json:Array="true">80202</equipments>
</data>

And this is my xslt:

<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output indent="yes"/>
  <xsl:template match="/data">
    <data xmlns:json="http://james.newtonking.com/projects/json">
      <xsl:apply-templates select="node()|@*" />
    </data>
  </xsl:template>

  <xsl:template match="@*">
    <xsl:attribute name="{local-name()}">
      <xsl:value-of select="." />
    </xsl:attribute>
  </xsl:template>

  <xsl:template match="node()">
    <xsl:copy>
      <xsl:apply-templates select="node()|@*" />
    </xsl:copy>
  </xsl:template>

  <xsl:template match="@jsonArray">
    <xsl:attribute name="json:Array">
      <xsl:value-of select="."/>
    </xsl:attribute>
  </xsl:template>
</xsl:stylesheet>

When I'm trying to convert my xml, I keep getting this message:

Error occurred while compiling stylesheet 'CS_jsonArray.xslt'.

Code: 0x80004005

Reference to undeclared namespace prefix: 'json'.

**Never post code and XML as images**. Use text formatted as code. Click the [edit] link and correct. Be sure to include a [mcve]. — kjhughes, Nov 24 '16 at 18:41
*When I'm trying to convert my xml*...and where is this trial? — Parfait, Nov 24 '16 at 21:18
The solution is to declare the undeclared namespace prefix: 'json'. You did not show us your stylesheet, but you can find many examples if you search for them. — michael.hor257k, Nov 24 '16 at 22:46

score 0 · Answer 1 · edited May 23 '17 at 10:32

After looking in the 'Related' sidebar, I did found the answer to my own question.

XSL transformation - Namespace prefix undeclared

So for those who have a same issue, be sure the namespace you want to change the attribute names for, is also in the xslt tag itself...

This is how my xslt started:

<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output indent="yes"/>...

This is how I changed it:

<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:json="http://james.newtonking.com/projects/json">
  <xsl:output indent="yes"/>...

Reference to undeclared namespace prefix: 'json'. while renaming xml attibute with xslt

1 Answers1