Re: a nicer total sibling count than this
--- scruss at sympatico dot ca wrote: > > I'm working with a dictionary marked up in XML. Conventionally, one > numbers definitions (def elements here) only if there are two or > more > definitions for the given part of speech. > > To my surprise and delight, the following worked, producing heavy def > numbers with a following non-break space: > > <xsl:template match="def"> > <xsl:if test="(count(preceding-sibling::def) + > count(following-sibling::def)) >= 1"> > <xsl:element name="strong"> > <xsl:number/> > <xsl:text>?</xsl:text> > </xsl:element> > </xsl:if> > <xsl:apply-templates/> > </xsl:template> > > Is there a prettier/more efficient way of doing the same thing > without > resorting to frankly ugly > '(count(preceding-sibling::def)+count(following-sibling::def))'? > > thanks, > Stewart Hi Stuart, count(preceding-sibling::def) + count(following-sibling::def) >= 1 is equivalent to: preceding-sibling::def or following-sibling::def The latter may be significantly optimised by a clever XSLT processor, because: 1. for either of preceding-sibling::def and following-sibling::def it is only necessary to see that a single (at least one) node is returned by the corresponding expression. This contrasts sharply with using count(), in which case all nodes in a (potentially long) node-set have to be counted. 2. If preceding-sibling::def has at least one node, then there's no need at all to evaluate (the other operand of "or") following-sibling::def __________________________________________________ Do you Yahoo!? Yahoo! News - Today's headlines http://news.yahoo.com XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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