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[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: RE: RE: RE: GMT to BST converter
 Thanks for pointing out my error. That makes sense. Here is the template I constructed. It has been lightly tested (most edge cases and the no-question cases). It has not been optimized. I image that it could be done more compactly and with fewer convenience variables. Although eliminating the convenience variables would make it much trickier to grasp, it would make the template more compact.
<?xml version="1.0" encoding="UTF-8" ?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes" encoding="UTF-8" />
<xsl:param name="start-date" select="'23'" />
<xsl:param name="end-date" select="'28'" />
<xsl:template match="/">
<xsl:apply-templates />
</xsl:template>
<xsl:template match="Date">
<xsl:variable name="DOW" select="substring-before(., ', ')" />
<xsl:variable name="dm" select="substring-before(substring-after(.,', '),', ')" />
<xsl:variable name="M" select="substring-after($dm,' ')" />
<xsl:variable name="D" select="substring-before($dm,' ')" />
<xsl:variable name="h" select="substring-before(substring-after(substring-after(substring-after(.,$dm), ', '), ', '), ' GMT')" />
<xsl:variable name="y" select="substring-after(substring-before(., $h),$dm)" />
<xsl:variable name="Y" select="substring-before(substring-after($y, ', '), ',')" />
<xsl:variable name="shr" select="concat(number(substring-before($h, ':')) + 1, ':', substring-after($h, ':'))" />
<xsl:choose>
<xsl:when test="$M='October'" >
<xsl:choose>
<xsl:when test="$DOW = 'Sunday' and $D > 24">
<xsl:choose>
<xsl:when test="number(substring-before($h, ':')) < 1">
<Date><xsl:value-of select="concat($DOW, ', ', $D, ' ', $M, ', ',$Y, ', ', $shr, ' BST')" /></Date>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:when test="$DOW = 'Monday' and $D > 25">
<xsl:choose>
<xsl:when test="number(substring-before($h, ':')) < 1">
<Date><xsl:value-of select="concat($DOW, ', ', $D, ' ', $M, ', ',$Y, ', ', $shr, ' BST')" /></Date>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:when test="$DOW = 'Tuesday' and $D > 26">
<xsl:choose>
<xsl:when test="number(substring-before($h, ':')) < 1">
<Date><xsl:value-of select="concat($DOW, ', ', $D, ' ', $M, ', ',$Y, ', ', $shr, ' BST')" /></Date>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:when test="$DOW = 'Wednesday' and $D > 27">
<xsl:choose>
<xsl:when test="number(substring-before($h, ':')) < 1">
<Date><xsl:value-of select="concat($DOW, ', ', $D, ' ', $M, ', ',$Y, ', ', $shr, ' BST')" /></Date>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:when test="$DOW = 'Thursday' and $D > 28">
<xsl:choose>
<xsl:when test="number(substring-before($h, ':')) < 1">
<Date><xsl:value-of select="concat($DOW, ', ', $D, ' ', $M, ', ',$Y, ', ', $shr, ' BST')" /></Date>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:when test="$DOW = 'Friday' and $D > 29">
<xsl:choose>
<xsl:when test="number(substring-before($h, ':')) < 1">
<Date><xsl:value-of select="concat($DOW, ', ', $D, ' ', $M, ', ',$Y, ', ', $shr, ' BST')" /></Date>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:when test="$DOW = 'Saturday' and $D > 30">
<xsl:choose>
<xsl:when test="number(substring-before($h, ':')) < 1">
<Date><xsl:value-of select="concat($DOW, ', ', $D, ' ', $M, ', ',$Y, ', ', $shr, ' BST')" /></Date>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:otherwise>
<Date><xsl:value-of select="concat($DOW, ', ', $D, ' ', $M, ', ',$Y, ', ', $shr, ' BST')" /></Date>
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:when test="$M='March'" >
<xsl:choose>
<xsl:when test="$DOW = 'Sunday' and $D > 24">
<xsl:choose>
<xsl:when test="number(substring-before($h, ':')) >= 1">
<Date><xsl:value-of select="concat($DOW, ', ', $D, ' ', $M, ', ',$Y, ', ', $shr, ' BST')" /></Date>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:when test="$DOW = 'Monday' and $D > 25">
<xsl:choose>
<xsl:when test="number(substring-before($h, ':')) >= 1">
<Date><xsl:value-of select="concat($DOW, ', ', $D, ' ', $M, ', ',$Y, ', ', $shr, ' BST')" /></Date>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:when test="$DOW = 'Tuesday' and $D > 26">
<xsl:choose>
<xsl:when test="number(substring-before($h, ':')) >= 1">
<Date><xsl:value-of select="concat($DOW, ', ', $D, ' ', $M, ', ',$Y, ', ', $shr, ' BST')" /></Date>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:when test="$DOW = 'Wednesday' and $D > 27">
<xsl:choose>
<xsl:when test="number(substring-before($h, ':')) >= 1">
<Date><xsl:value-of select="concat($DOW, ', ', $D, ' ', $M, ', ',$Y, ', ', $shr, ' BST')" /></Date>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:when test="$DOW = 'Thursday' and $D > 28">
<xsl:choose>
<xsl:when test="number(substring-before($h, ':')) >= 1">
<Date><xsl:value-of select="concat($DOW, ', ', $D, ' ', $M, ', ',$Y, ', ', $shr, ' BST')" /></Date>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:when test="$DOW = 'Friday' and $D > 29">
<xsl:choose>
<xsl:when test="number(substring-before($h, ':')) >= 1">
<Date><xsl:value-of select="concat($DOW, ', ', $D, ' ', $M, ', ',$Y, ', ', $shr, ' BST')" /></Date>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:when test="$DOW = 'Saturday' and $D > 30">
<xsl:choose>
<xsl:when test="number(substring-before($h, ':')) >= 1">
<Date><xsl:value-of select="concat($DOW, ', ', $D, ' ', $M, ', ',$Y, ', ', $shr, ' BST')" /></Date>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="." />
</xsl:otherwise>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>
--
Charles Knell
cknell@xxxxxxxxxx - email
-----Original Message-----
From: Michael Kay <mike@xxxxxxxxxxxx>
Sent: Fri, 15 Apr 2005 19:36:53 +0100
To: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx>
Subject: RE: RE: RE: GMT to BST converter
>
> http://webexhibits.org/daylightsaving/b.html
> >
> > All the references I've found on the web (including the BBC)
> > say that it (BST) begins and ends at 0100 hours. In the U.S.
> > the time is 0200 so the issue of "Is it today or yesterday?"
> > doesn't come up.
> >
> > > When the clock is turned back at the end of Summer Time, does
> > > the time then become 00:00:01 of the same day or is it set
> > > back to midnight of the previous day?
> >
The reference above says that BST ends at 01:00 GMT, i.e. at 02:00 BST.
Michael Kay
http://www.saxonica.com/
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