XSLT: Modify element name and attribute values

Question

I'm completely new at this and am trying to figure out how to do something like this:

I've got this type of tags (lots of them) in an XML-file

<ImageData src="whatever.tif"/>

What I need to do is first change them to a reference with a number like this:

<INCL.ELEMENT FILEREF="image0001.tif" TYPE="TIFF"/>

so the number has to get leading zeros and the type has to be found in the src-attribute.

When all this has changed a list of these elements ALSO has to be added on top of the xml like this

<INCLUSIONS>  
  <INCL.ELEMENT FILEREF="image0001.tif" TYPE="TIFF"/>
  <INCL.ELEMENT FILEREF="image0002.tif" TYPE="TIFF"/>  
  <INCL.ELEMENT FILEREF="image0003.tif" TYPE="TIFF"/>  
  <INCL.ELEMENT FILEREF="image0004.tif" TYPE="TIFF"/>  
  ...  
  <INCL.ELEMENT FILEREF="image0014.tif" TYPE="TIFF"/>  
</INCLUSIONS>

Since I'm new at this I'm clueless as to where to start.

Some feedback on my answer would have been nice.

Filburt
– Filburt

2010-03-21 20:23:18 +00:00
Commented Mar 21, 2010 at 20:23 — Filburt
– Filburt, Commented Mar 21, 2010 at 20:23

Filburt · Accepted Answer · 2010-01-18 10:05:34Z

2

This should give you something to start with:

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

    <xsl:template match="/">
        <INCLUSIONS>
            <xsl:apply-templates />
        </INCLUSIONS>
    </xsl:template>

    <xsl:template match="ImageData">
        <xsl:variable name="imagecount" select="count(preceding::ImageData) + 1" />
        <xsl:variable name="fileextension" select="substring-after(./@src, '.')"/>
        <INCL.ELEMENT>
            <xsl:attribute name="FILEREF">
                <xsl:value-of select="concat('image', format-number($imagecount, '0000'), '.', $fileextension)"/>
            </xsl:attribute>
            <xsl:attribute name="TYPE">
                <xsl:choose>
                    <xsl:when test="$fileextension='tif'">TIFF</xsl:when>
                    <xsl:otherwise>JPEG</xsl:otherwise>
                </xsl:choose>
            </xsl:attribute>
        </INCL.ELEMENT>
    </xsl:template>

answered Jan 18, 2010 at 10:05

Filburt

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4 Comments

Tomalak Over a year ago

substring-after(@src, '.') is somewhat brittle. substring(@src, string-length(@src) - 3, 3) is better.

Filburt Over a year ago

Hhhmm ... but that would fail .jpeg and the like.

Tomalak Over a year ago

Not as long as you are only interested in 'tif', as the question seems to indicate. Also, you could still compare to 'jpg' and 'peg'. Chances are quite small that an image file ends with 'peg' and is not a jpeg.

Filburt Over a year ago

Okay - if i'd strictly go for 'tif' i'd skip the substring altogether and hardcode the filename and the type attribute. ... and one day for sure there's popping up an .mpeg ;-)

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