Subject: RE: [xsl] new: how to change value of attributes From: "ivanmacculi\@libero\.it" <ivanmacculi@xxxxxxxxx> Date: Wed, 25 Nov 2009 20:18:40 +0100 |
thanks Michael Kay, i have appreciated your very important valued. i use XSL for my work, i 've studied XML with books of Scott Means e Rusty Harold and XSL with that one of van Otegem, but i don't understand what you wrote. Where can i find something about Xpath expression? in the site of W3C, for example, i cant' find what does ^ mean and f:index-of-node too. Can you explane me? Thank you a lot. > > <xsl:template match="mets:div/@LABEL[matches(., '^Pagina [0-9]+$')]"> > > <xsl:variable name="n"> > > <xsl:number level="any" count="mets:div[@LABEL[matches(., '^Pagina > [0-9]+$')]]"/> > > </xsl:variable> > > <xsl:attribute name="LABEL" select="concat('Carta ', > if ($n mod 2 = 0) then concat(($n + 1) idiv 2, 'v') else > concat(($n + 1) idiv 2, 'r'))"/> > > </xsl:template> > > > > The redundancy of repeating the whole pattern is pretty horrible, both for > performance and for maintenance. > > An idiom I have used in such cases is: > > <xsl:variable name="g" select="//mets:div[matches(@LABEL, '^Pagina > [0-9]+$')]"/> > > <xsl:template match="*[. intersect $g]/@LABEL"> > <xsl:variable name="n" select="f:index-of-node($g, .)"/> > > where > > <xsl:function name="f:index-of-node" as="xs:integer*"> > <xsl:param name="nodes" as="node()*"/> > <xsl:param name="node" as="node()"/> > <xsl:for-each select="$nodes"> > <xsl:sequence select="position()[current() is $node]"/> > </xsl:for-each> > </xsl:function> > > which still isn't ideal, but it feels a bit better. > > > Regards, > > Michael Kay > http://www.saxonica.com/ > http://twitter.com/michaelhkay
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