Entry
XML: XSL: Debug: Variable: XSL: How to debug XSL variables?
Sep 24th, 2003 15:22
Knud van Eeden,
----------------------------------------------------------------------
--- Knud van Eeden --- 25 September 2003 - 00:09 am ------------------
XML: XSL: Debug: Variable: XSL: How to possibly debug XSL variables?
Method: Use the <xsl:message> tag
or possibly also the
<xsl:comment> tag.
---
e.g. put this in your XSL code:
<xsl:message terminate="yes">
<xsl:value-of select="."/>
</xsl:message>
---
e.g.
1. Your XSL file:
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0">
<xsl:template match="/">
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="MYBOOKS">
<HTML>
<HEAD>
<TITLE>
My book database
</TITLE>
</HEAD>
<BODY>
<H3> Overview book database </H3>
<BR/>
<BR/>
<HR/>
<HR/>
<!-- debug here -->
<xsl:message terminate="yes">
<xsl:copy-of select="*"/>
</xsl:message>
<xsl:apply-templates/>
<HR/>
</BODY>
</HTML>
</xsl:template>
<xsl:template match="BOOK">
<FONT SIZE="3" COLOR="blue">
<BR/> book:
<xsl:apply-templates/>
</FONT>
<HR/>
</xsl:template>
<xsl:template match="AUTHOR">
<BR/> author=
<xsl:value-of select="."/>
</xsl:template>
<xsl:template match="TITLE">
<BR/> title=
<xsl:value-of select="."/>
</xsl:template>
</xsl:stylesheet>
---
2. Your XML file:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE MYBOOKS SYSTEM "book.dtd">
<?xml-stylesheet type="text/xsl" href="dddbook.xsl"?>
<!-- library: (filenamemacro=book.xml) -->
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE MYBOOKS SYSTEM "book.dtd">
<?xml-stylesheet type="text/xsl" href="book.xsl"?>
<!-- library: (filenamemacro=book.xml) -->
<MYBOOKS>
<BOOK>
<AUTHOR>
Holzner, Steve
</AUTHOR>
<TITLE>
Inside XML
</TITLE>
</BOOK>
<BOOK>
<AUTHOR>
Knuth, Donald
</AUTHOR>
<TITLE>
the art of computer programming
</TITLE>
</BOOK>
</MYBOOKS>
---
3. This will show:
Overview book database
-----------------------------------------------------------------------
---------
-----------------------------------------------------------------------
---------
The XML page cannot be displayed
Cannot view XML input using XSL style sheet. Please correct the error
and then click the Refresh button, or try again later.
-----------------------------------------------------------------------
---------
Holzner, Steve Inside XML Knuth, Donald the art of computer programming
---
---
Method: use the XMLSpy debugger
Download e.g. XMLSpy v2004 Enterprise trial version from
http://www.xmlspy.com
This program has a very good inbuilt debugger to further go step
by step through your XSL source code.
---
---
Internet: see also:
http://www-106.ibm.com/developerworks/xml/library/x-debugxs.html
About the xsl tag <xsl:message>
http://www.devguru.com/Technologies/xslt/quickref/xslt_element_message.
html
----------------------------------------------------------------------
