How to transform this XML file into another using XSLT?

Question

I have this XML file:

<messages>
    <text>
        See you next <corr form="week">wk</corr>.
    </text>
    <text>
        Are you ready <number form="for">4</number> this <duplicate form="week">weeeek</duplicate> end<mark>?</mark>
    </text>
</messages>

that I want to change into this one by using XSLT 1.0:

<file>
<messages>
    <node>
        <text>See you next </text>
        <node>
            <text>week</text>
        </node>
    </node>
</messages>

<messages>
    <node>
        <text>Are you ready </text>
        <node>
            <text> for</text>
            <node>
                <text> this</text>
                <node>
                    <text> week</text>
                    <node>
                        <text> end</text>
                        <node>
                            <text> ?</text>
                        </node>
                    </node>
                </node>
            </node>
        </node>
    </node>
</messages>
</file>

In the second file, everytime we reach a tag with a "form" attribute, we have to create a new node with the form text in its own tag.

Here's my XSLT but it doesn't work well since the tags aren't at the right place. Help please?

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">

<xsl:template match="/">
    <xsl:element name="file/messages">
        <xsl:for-each select="text">
            <xsl:apply-templates/>
        </xsl:for-each>
    </xsl:element>
</xsl:template>

<!-- here, this doesn't work... -->
<xsl:template match="text"> 
    &lt;node&gt;&lt;text&gt; 
    <xsl:apply-templates/>
    &lt;/text&gt;&lt;/node&gt;
</xsl:template>

<xsl:template match="*[@form]">
    <!-- gets the tag name -->
    <xsl:variable name="attribute" select="local-name()"/> 

    &lt;node&gt;&lt;text&gt;

    <!-- print the form text -->
    <xsl:if
        test="$attribute='corr' or $attribute='number' or $attribute='duplicate'">
        <xsl:value-of select="./@form"/> 
        &lt;/text&gt;&lt;/node&gt;
    </xsl:if>

    <!-- print the "?" -->
    <xsl:if
        test="($attribute!='corr' and $attribute!='number' and $attribute!='duplicate'">
        <xsl:value-of select="."/> 
        &lt;/text&gt;&lt;/node&gt;
    </xsl:if>
</xsl:template>

</xsl:stylesheet>

Answer 1

If you are sure that's the output you want, try the following approach, known as " sibling recursion ":

XSLT 1.0
(edited to conform to the edited question)

<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>

<xsl:template match="messages">
    <file>
        <xsl:apply-templates select="text"/>
    </file>
</xsl:template>

<xsl:template match="text">
    <message>
        <xsl:apply-templates select="node()[1]"/>
    </message>
</xsl:template>

<xsl:template match="text/*[@form]">
    <node>
        <text><xsl:value-of select="@form"/></text>
        <xsl:apply-templates select="following-sibling::node()[1]"/>
    </node>
</xsl:template>

<xsl:template match="text/text() | text/*[not(@form)]">
    <node>
        <text><xsl:value-of select="."/></text>
        <xsl:apply-templates select="following-sibling::node()[1]"/>
    </node>
</xsl:template>

</xsl:stylesheet>

When applied to the following test input :

<messages>
    <text>See you next <corr form="week">wk</corr>.</text>
    <text>Are you ready <number form="for">4</number> this <duplicate form="week">weeeek</duplicate> end<mark>?</mark></text>
</messages>

the result will be:

<?xml version="1.0" encoding="UTF-8"?>
<file>
   <message>
      <node>
         <text>See you next </text>
         <node>
            <text>week</text>
            <node>
               <text>.</text>
            </node>
         </node>
      </node>
   </message>
   <message>
      <node>
         <text>Are you ready </text>
         <node>
            <text>for</text>
            <node>
               <text> this </text>
               <node>
                  <text>week</text>
                  <node>
                     <text> end</text>
                     <node>
                        <text>?</text>
                     </node>
                  </node>
               </node>
            </node>
         </node>
      </node>
   </message>
</file>