Dear Gents,
Getting quite comfortable using XSL. Since I am using alot more heavy-duty XSL,
I am now hitting barriers with performance. My quesiton to the forum is for
once, not a beginner's question!
In transforming the <syl> tags below into HTML table cells to display them, I
need to format each cell with a green color with the running total of the
@length attributes is a multiple of four. Ideally having the ability to do
running totals in another variable would be great, but not the best XSL-esque
solution, so I am using axes instead. I have tried solutions with count and
sum, but performance is slow: 756 lines like the ones below mean thousands of
syllables to check, each with its own axis computation -- the complete xform
takes more than an hour!
Can anyone point me to a solution that is more performant yet still
elegant/simple?
An aside: it seems that ceiling() is an Xpath1.0 function, but oddly enough not
floor() -- Altova SPY complains about floor until I change the stylesheet to
version 2.0 (sigh). I would love this to transform in XSL1.0 if possible, and
rounding down each length to the integer is essential to acheive the correct
formatting result.
Thanks in advance for any help on this.
XML:
<poem>
<line id="1">
<word id="1">
<syl length="2">Ar</syl>
<syl length="1">ma</syl>
</word>
<word id="2">
<syl length="1">vi</syl>
<syl length="2">rum</syl>
</word>
<syl length="1">que</syl>
<word id="3">
<syl length="1">ca</syl>
<syl length="2">no</syl>
</word> ,
<word id="4">
<syl length="2">Tro</syl>
<syl length="2">iae</syl>
</word>
<word id="5">
<syl length="2">qui</syl>
</word>
<word id="6">
<syl length="2">pri</syl>
<syl length="1">mus</syl>
</word>
<word id="7">
<syl length="1">ab</syl>
</word>
<word id="8">
<syl length="2">o</syl>
<syl length="2">ris</syl>
</word>
</line>
<line id="2">
<word>
<syl length="2">li</syl>
<syl length="1.5">to</syl>
<syl length="1">ra</syl>
</word> ,
<word id="15">
<syl length="2">mul</syl>
<syl elide="true" length="1">tum</syl>
</word>
<word id="16">
<syl length="2">il</syl>
<syl elide="true" length="1">le</syl>
</word>
<word id="17">
<syl length="2">et</syl>
</word>
<word id="18">
<syl length="2">ter</syl>
<syl length="2">ris</syl>
</word>
<word id="19">
<syl length="2">iac</syl>
<syl length="2">ta</syl>
<syl length="1">tus</syl>
</word>
<word id="20">
<syl length="1">et</syl>
</word>
<word id="21">
<syl length="2">al</syl>
<syl length="2">to</syl>
</word>
</line>
</poem>
XSL template:
<xsl:template match="syl">
<xsl:variable name="line_id"><xsl:value-of select="node()/ancestor::line/@id"
/></xsl:variable>
<xsl:variable name="current_quantity"><xsl:value-of
select="sum(preceding::syl[ancestor::line/@id = $line_id and (not(@elide) or
@elide='false') ]/floor(@length))" /></xsl:variable>
<xsl:variable name="color"><xsl:choose><xsl:when test="@length=2 and
($current_quantity mod 4 =
0)">background-color:#EEFFEE;</xsl:when></xsl:choose></xsl:variable>
<td style="{$color}"><xsl:value-of select="text()" /></td>
</xsl:template>
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