Re: Cannot use a parameter value in the group-startin
Hi. I'm writing a 2.0 stylesheet and my processor is Saxon HE 18.104.22.168. Also, I'm just starting out with XSLT.
There are two problems there, one is that patterns use a restricted syntax compared to xpath, but more importantly parameters and variables in xpath hold _values_ (as they would in c or fortran) not fragments of syntax 9as they would in a shell scripting language)
so when you go <xsl:with-param name="starting-element" select = "h1" />
the parameter does not hold the fragment of a pattern "h1" it holds the result of ebaluating teh expression h1 at that point, which is a possibly empty sequence of h1 nodes.
the this works
<xsl:for-each select = "$starting-element">
but it is not (at that point) selecting h1 elements it is simply iterating over the list of elements that has already been selected and stored in the $starting-element variable.
but this could not work even if it were not a syntax error
<xsl:for-each-group select = "*" group-starting-with = "$starting-element">
the grouping attributes need to take patterns or expressions used to filter the nodes selected, not take a sequence of nodes.
so do not pass in a sequence of nodes, pass in a string:
<xsl:with-param name="starting-element" select = "'h1'" />
(note the extra quotes(
then you can use that string in a pattern
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