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[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: Recursive positional grouping (was xsl digest...)
 Within xsl:for-each-group, current-group() selects all the nodes in the group being processed, whereas "." selects only the first node in that group. Writing "." is equivalent to writing current-group()[1]. Michael Kay http://www.saxonica.com/ > -----Original Message----- > From: john jacks [mailto:john.jacks@xxxxxxxxxxx] > Sent: 05 April 2007 08:28 > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx > Subject: RE: Recursive positional grouping (was xsl digest...) > > Thanks Michael. > (As Abel pointed out, I'm replying to the digest since that's > what I receive). > > This works nicely. I don't understand the difference between > <xsl:apply-templates select="."/> > > and > > <xsl:apply-templates select="current-group()"/> > > within the xsl:for-each-group instruction. > > The book says ' use current-group() is sometimes better > especially if the group includes elements of different types' > which this example does. > > How can I understand the difference please? > > JJ > > > From: "Michael Kay" <mike@xxxxxxxxxxxx> > Subject: RE: Recursive positional grouping (was xsl digest...) > Message-ID: <009e01c7769e$d165d290$6401a8c0@turtle> > > I think your problem is that > > <xsl:apply-templates select="current-group()"/> > > is processing all the elements in a group, not only the > next-level headings > - so the paragraphs are output at every level. > > I think this kind of recursive grouping works best if you use > a named template that is passed the contents of a group as a > parameter. Try something like this: > > <?xml version="1.0" encoding="ISO-8859-1"?> <xsl:stylesheet > version="2.0" > xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; > xmlns:xs="http://www.w3.org/2001/XMLSchema";> > <xsl:output indent="yes"/> > > <xsl:template name="group"> > <xsl:param name="pop" as="element()*"/> > <xsl:param name="level" as="xs:integer" /> > <xsl:variable name="key" as="xs:string" select="concat('h', > $level)"/> > <xsl:for-each-group select="$pop" > group-starting-with="*[name() eq $key]"> > <xsl:choose> > <xsl:when test="starts-with(name(.), 'h')"> > <section level="{$level}"> > <head><xsl:apply-templates > select="current-group()[1]"/></head> > <xsl:call-template name="group"> > <xsl:with-param name="pop" > select="remove(current-group(), 1)"/> > <xsl:with-param name="level" select="$level + 1"/> > </xsl:call-template> > </section> > </xsl:when> > <xsl:otherwise> > <xsl:copy-of select="current-group()"/> > </xsl:otherwise> > </xsl:choose> > </xsl:for-each-group> > </xsl:template> > > <xsl:template match="/"> > <doc> > <xsl:call-template name="group"> > <xsl:with-param name="pop" select="body/*"/> > <xsl:with-param name="level" select="1"/> > </xsl:call-template> > </doc> > </xsl:template> > > </xsl:stylesheet> > > > > > > > > > > ___________________________________________________________ > New Yahoo! Mail is the ultimate force in competitive > emailing. Find out more at the Yahoo! Mail Championships. > Plus: play games and win prizes. > http://uk.rd.yahoo.com/evt=44106/*http://mail.yahoo.net/uk 
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