Subject: Re: [xsl] How can I know if a node has already been processed ? From: David Carlisle <davidc@xxxxxxxxx> Date: Thu, 6 Nov 2008 22:22:31 GMT 
> sin x should be translated sin(x) but is translated sin(x)x when processing MathML (which was an explict use case during the design phase of XSLT, including joint teleconference between math and xsl working groups to make sure that processing mathml was feasible) you want to process the abstract function tree not the xml tree directly. so in sin(x) you want to think of sin as a head with child x, process sin first and then prcess the child. However the markup is <apply> <sin/> <mi>x</mi> </apply> so x is a sibling of sin not its child. However you should write your templates with a mental model as if sin were the parent. You don't want the template matching apply just to process all its children, you want the processing of x to be controlled by the first child of the apply (sin). One way s always to match on thins like apply[*[1][self::sin] to just match an apply with head sin. look at http://www.w3.org/Math/XSL/ctop.xsl which is processing contnet mathml to presentation mathml, but themethods of matching mathl structures are usually very similar whatevr the output format. It basically consists of a lot of templates like: <xsl:template mode="c2p" match="mml:apply[*[1][self::mml:inverse]]"> <mml:msup> <xsl:applytemplates mode="c2p" select="*[2]"/> <mml:mrow><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow> </mml:msup> </xsl:template> so this is the template for inverse which typesets its "child" and superscripts the result with 1. the match pattern is the way it is because the syntax is <apply> <inverse/> <ci>x</ci> </inverse> but if the syntax had been <inverse> <ci>x</ci> </inverse> The template could have been <xsl:template mode="c2p" match="mml:mml:inverse"> <mml:msup> <xsl:applytemplates mode="c2p" select="*[1]"/> <mml:mrow><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow> </mml:msup> </xsl:template> which saves a few keystrokes but really isn't any simpler once you get used to the mml:apply[*[1][self::mml:inverse]] idion used in the first match. David incidentally are you in touch with other people working on mathml from braille, eg http://www.ascience.eu/?q=en/wsParis/Archambault D ________________________________________________________________________ The Numerical Algorithms Group Ltd is a company registered in England and Wales with company number 1249803. The registered office is: Wilkinson House, Jordan Hill Road, Oxford OX2 8DR, United Kingdom. This email has been scanned for all viruses by Star. The service is powered by MessageLabs. ________________________________________________________________________
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