Referencing an XML doctype entity from XSLT

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP


Referencing an XML doctype entity from XSLT



I'm trying to access the !ENTITY elements in an XML file's !DOCTYPE declaration when using an XSL file to transform the XML to HTML. In the XML, I have a widget element that has an attribute that corresponds to the !ENTITY name, and I want the XSLT to transform that into the !ENTITY's value.


!ENTITY


!DOCTYPE


widget


!ENTITY


!ENTITY



XML File


<?xml version="1.0" encoding="utf-8"?>

<!DOCTYPE root[
<!ENTITY Widget_Manual "Widget_Manual_File_Name.pdf" >
]>

<root>
<!-- I want to convert this to "Widget_Manual_File_Name.pdf" in the transform -->
<widget entityIdent="Widget_Manual" />
</root>



XSLT File


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

<xsl:template match="/">
<html>
<head />
<body>
<xsl:apply-templates />
</body>
</html>
</xsl:template>

<xsl:template match="widget">
<!-- Embed PDF -->
<object width="800" height="600" type="application/pdf">
<xsl:attribute name="data">
<!-- How do I access the !ENTITY's value using the @entityIdent attribute? -->
<xsl:value-of select="@entityIdent" />
</xsl:attribute>
</object>
</xsl:template>

</xsl:stylesheet>



Actual Output


<object width="800" height="600" type="application/pdf" data="Widget_Manual"></object>



Desired Output


<object width="800" height="600" type="application/pdf" data="Widget_Manual_File_Name.pdf"></object>




1 Answer
1



It would be best to just use an entity in the XML, so that the XML parser would expand the entity for you when it parses the doc.


<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE root[
<!ENTITY Widget_Manual "Widget_Manual_File_Name.pdf" >
]>
<root>
<!-- I want to convert this to "Widget_Manual_File_Name.pdf" in the transform -->
<widget entityIdent="&Widget_Manual;" />
</root>



If you don't have control of the XML and want to perform the find/replace in the XSLT, then you will have to jump through some hoops. The XSLT operates on the XML that has already been parsed and evaluated, and the DTD content is not directly addressable. However, you could obtain the base-uri() and then use unparsed-text() to read the XML as a string, and then use replace() with a regex that has a capture group (or substring functions) to obtain the value of the ENTITY.


base-uri()


unparsed-text()


replace()



The following XSLT 2.0 stylesheet could be used:


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

<xsl:template match="@entityIdent">
<xsl:attribute name="{name()}">
<xsl:value-of select="replace(
unparsed-text(base-uri()),
concat('.*!ENTITY ', ., ' &quot;(.+?)&quot;.*'),
'$1',
's')"/>
</xsl:attribute>
</xsl:template>
</xsl:stylesheet>






By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

-

Popular posts from this blog

Arduino Mega cannot recieve any sketches, stk500_recv() programmer is not responding

Image
Clash Royale CLAN TAG #URR8PPP Arduino Mega cannot recieve any sketches, stk500_recv() programmer is not responding Yesterday we were trying to update the firmware of our 3D-printer a Tevo Tarantula i3 The printer was running Marlin 3D Printer Firmware. We installed a new module a TL-Touch Sensor, a chinese copy of the Bl-Touch an auto bedleveling touch sensor for a 3D printer. After re-configurating a new version of the firmware for our setup in the Arduino IDE we went on with uploading the sketch to the Arduino Mega that was controling our 3D printer. Before we started uploading we made sure the right COM-port was selected in the Arduino IDE and that also the right type of Arduino was selected. The Arduino Mega 2260. Then we started with compiling the firmware and then uploading it to the Mega, Somewhere in between that moment the IDE freezed and crashed. As a response we removed the USB cable that was connected from the PC uploading the firmware onto the Arduino Mega, (This was a st...
Read more

Visual Studio Code: How to configure includePath for better IntelliSense results

Image
Clash Royale CLAN TAG #URR8PPP Visual Studio Code: How to configure includePath for better IntelliSense results so I am a complete beginner to using Visual Studio Code and I have no clue what I am doing. I've searched around (maybe not enough), but I cant find just a simple explanation for someone like me on how to configure the c_cpp_properties.json file that I am redirected to whenever I click on the yellow lightbulb next to a line that is underlined with a green squiggle. Lightbulb example c_cpp_properties.json I just want to know what to put in the .json to make IntelliSense work properly This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. 2 Answers 2 From: https://code.visualstudio.com/docs/languages/cpp Below you can see that the MinGW C++ include path has been added to browse.path for Windows: { "name": "Win32...
Read more

C++ virtual function: Base class function is called instead of derived

Image
Clash Royale CLAN TAG #URR8PPP C++ virtual function: Base class function is called instead of derived I have following code snippet: using namespace std; class base { public: virtual void print(char a){ std::cout<<" Base "<<std::endl;} }; class derived :public base { public: void print(floata) {std::cout<<" Derived "<<std::endl;} }; int main() { base* d = new derived; d->print(1.5); return 0; } Output is "base" Why output is coming from base function and not from derived one By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.
Read more