TopXML JavaScript library : How to understand the flow of control in XLST

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By	Andreas
First Posted	08/28/2002
Times viewed	200

How to understand the flow of control in XLST

Summary Addendum to "Binding XML Data Island to Web Forms". My first steps in understanding and debugging XLST.

This morning I found an article from Chris Dorsey Binding XML Data Island to Web Forms http://www.topxml.com/code/default.asp?p=3&id=v20020826232101&ms=10&l=xsl&sw=lang in this section. I started learning XML/XLST/DOM/data islands this weekend. Although I am an experienced programmer and I read some books in the last time the learning curve for XML/XLST was not very steep. But from this example I learned a lot. So much that I would say there are some unnecessary templates in the XSL file. Also text nodes in the root node are not handled. To avoid the long lines I wrote two named templates. IMHO this is more handy. The style of writing the templates seems to be at least obscure. But I didn't know how to write the code so that no line feeds are produced. I changed the XLST and appended it as the first part. I also appended second XLST file for understanding and debugging of the original script and this did the trick for me. The first time I was able to predict what will happen. Of course in the frame of my limited knowledge. Thanks to Chris for his really helpful example. P.S. It may be obvious but I used this script for testing this case. If course the HTML structure is destroyed with the second XLST file. DIM xscrc,xstl set xsrc = CreateObject(MSXML2.DOMDocument.4.0) xsrc.async = false xsrc.load WScript.Arguments.Item(0) set xstl = CreateObject(MSXML2.DOMDocument.4.0) xstl.async = false xstl.load WScript.Arguments.Item(1) wscript.echo xsrc.transformNode(xstl) and with cscript test.vbs //NOLOGO test.xml test.xlst I get the transformation results.

/[~ /[~/@
Additional information
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="/"> <table border="0" cellpadding="0" cellspacing="10"> <xsl:apply-templates /> </table> </xsl:template> <xsl:template match="*"> <xsl:apply-templates select="@*"/> <xsl:apply-templates/> </xsl:template> <xsl:template match="text()"> <tr valign="top"> <td><xsl:value-of select="name(parent::*)" /></td> <td> <textarea> <xsl:attribute name="onblur">updateNode('<xsl:call-template name="onBlurNode"/>',this)</xsl:attribute> <xsl:attribute name="cols">75</xsl:attribute> <xsl:attribute name="rows"><xsl:value-of select="round(string-length(.) div 75) + 1" /></xsl:attribute> <xsl:value-of select="."/>

updateAttribute('',this) text

... END ...xsl:template match="*[text()~" ...TEXT NODE ... ... START ...xsl:template match="@*" ...ATTRIBUT NODE ... ... END ...xsl:template match="@*" ...ATTRIBUT NODE ... /[~ /[~/@

Further additional information
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="/"> ... START ...xsl:template match="/" ...ROOT node <xsl:value-of select="name(.)"/>... <table border="0" cellpadding="0" cellspacing="10"> <xsl:apply-templates /> </table> ... END ...xsl:template match="/" ...ROOT node <xsl:value-of select="name(.)"/>...</xsl:template> <xsl:template match="*"> ... START ...xsl:template match="*" ...PRINCIPAL NODE <xsl:value-of select="name(.)"/>... <xsl:apply-templates select="@*"/> <xsl:apply-templates/> ... END ...xsl:template match="*" ...PRINCIPAL NODE <xsl:value-of select="name(.)"/>...</xsl:template> <xsl:template match="text()"> ... START ...xsl:template match="*[text()~" ...TEXT NODE <xsl:value-of select="name(.)"/>... <tr valign="top"> <td><xsl:value-of select="name(parent::*)" /></td> <td> <textarea> <xsl:attribute name="onblur">updateNode('<xsl:call-template name="onBlurNode"/>',this)</xsl:attribute> <xsl:attribute name="cols">75</xsl:attribute> <xsl:attribute name="rows"><xsl:value-of select="round(string-length(.) div 75) + 1" /></xsl:attribute> <xsl:value-of select="."/>
updateAttribute('',this) text

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