RE: [xsl] Debugging XSLT

[David.Pawson@xxxxxxxxxxx]

DT said:
    3) You do not want the transformation to break each time an 
    error condition is met, it is waste of time. Instead, you 
    want as many reports about failed assertions as feasible 
    during one run. Embedding back-references to the code of 
    the stylesheet and to the input tree into the 
    transformation result and using a tool to check and report 
    assertion failures (not just validity assertion, and 
    obviously not just vcalidity assertions using one schema 
    language) is much better for the following reasons:
    
    - it is as powerful fo the same validation task
    - its is more powerful for debuggin in general since it allows
      to provide other types of assertions too, using 
    Schematron, for example;
    - it is easier to implement and support
    - it provides clear separation of layers
    - it does not contaminate the language with ugly kludges solving
      partial problems.


<xsl:variable name="debug" select="true()"/>


<xsl:template match="complicatedXPATHExpression">
<xsl:if test="$debug">
  complicatedXPATHExpression template:
src: <xsl:value-of select="name(..)"/>/<xsl:value-of select="name()"/>
val: [<xsl:value-of select="."/>]
</xsl:if>

 normal template processing


I like that.
   I'm often surprised by which template is producing content.
If going to html,
wrap it in html to make it stand out.


regards DaveP

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