Reorganized XSL in preparation to add text editor.

Author	Dave Jarvis <email>
Date	2014-12-05 14:49:46 GMT-0800
Commit	10518f557fb5ae2ee6469b516717604ae8477004
Parent	ebbc456

xml/.gitignore

		hColumns/
		+wysiwyg

xml/build.sh

		#!/bin/bash

		-# Use XSLT 2.0 to build the example HTML pages from the template.
		+# Use XSLT 2.0 to build the example HTML pages from the pages template.
		java -jar /home/jarvisd/dev/piechartdemo/saxon9he.jar \
		- -s:pages.xml -xsl:template.xsl
		+ -s:pages.xml -xsl:pages.xsl

xml/chart.xsl

		-<?xml version="1.0"?>
		-<!--
		- \| The MIT License
		- \|
		- \| Copyright 2014 White Magic Software, Inc.
		- \|
		- \| Permission is hereby granted, free of charge, to any person
		- \| obtaining a copy of this software and associated documentation
		- \| files (the "Software"), to deal in the Software without
		- \| restriction, including without limitation the rights to use,
		- \| copy, modify, merge, publish, distribute, sublicense, and/or
		- \| sell copies of the Software, and to permit persons to whom the
		- \| Software is furnished to do so, subject to the following
		- \| conditions:
		- \|
		- \| The above copyright notice and this permission notice shall be
		- \| included in all copies or substantial portions of the Software.
		- \|
		- \| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
		- \| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
		- \| OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
		- \| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
		- \| HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
		- \| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
		- \| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
		- \| OTHER DEALINGS IN THE SOFTWARE.
		- +-->
		-<xsl:stylesheet version="1.0"
		- xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
		-
		-<xsl:include href="math.xsl"/>
		-<xsl:include href="colour.xsl"/>
		-
		-<!-- Pie chart width and height. -->
		-<xsl:variable name="width" select="200"/>
		-<xsl:variable name="height" select="$width"/>
		-
		-<xsl:template match="resources">
		- <xsl:apply-templates mode="piechart"/>
		-</xsl:template>
		-
		-<xsl:template match="expenses">
		- <div class="expenses">
		- <xsl:apply-templates mode="piechart"/>
		- <xsl:apply-templates select="dataset"/>
		- </div>
		-</xsl:template>
		-
		-<xsl:template match="//dataset/*[name()='data' or name()='footer']/value">
		- <div class="value"><xsl:value-of
		- select="format-number(., '###,###')"/></div>
		-</xsl:template>
		-
		-<!-- Convert XML data into a pie chart. -->
		-<xsl:template match="dataset" mode="piechart">
		- <!-- Number of wedges. -->
		- <xsl:variable name="wedges" select="count(data)"/>
		-
		- <!-- Calculate the sum of all wedge values. -->
		- <xsl:variable name="total" select="sum(data//value)"/>
		-
		- <div class="chart">
		- <div class="graph">
		- <svg width="{$width}" height="{$height}" version="1.1"
		- xmlns="http://www.w3.org/2000/svg">
		- <xsl:for-each select="data">
		- <xsl:apply-templates select="value" mode="piechart">
		- <xsl:with-param name="colour">
		- <xsl:call-template name="fill">
		- <xsl:with-param name="wedge" select="position()"/>
		- <xsl:with-param name="wedges" select="$wedges"/>
		- <xsl:with-param name="colour" select="$base_colour"/>
		- </xsl:call-template>
		- </xsl:with-param>
		- <xsl:with-param name="total"
		- select="$total"/>
		- <xsl:with-param name="runningTotal"
		- select="sum(preceding-sibling::data/value)"/>
		- <xsl:with-param name="radius"
		- select="$width * 0.5"/>
		- </xsl:apply-templates>
		- </xsl:for-each>
		- </svg>
		- </div>
		-
		- <!-- SVG 1.1 has no text flow abilities. -->
		- <table class="legend" id="legend" name="legend">
		- <thead>
		- <tr>
		- <th colspan="2">Expense</th>
		- <th>Amount</th>
		- <th></th>
		- </tr>
		- </thead>
		- <tbody>
		- <xsl:for-each select="data//name">
		- <xsl:variable name="colour">
		- <xsl:call-template name="fill">
		- <xsl:with-param name="wedge" select="position()"/>
		- <xsl:with-param name="wedges" select="$wedges"/>
		- <xsl:with-param name="colour" select="$base_colour"/>
		- </xsl:call-template>
		- </xsl:variable>
		-
		- <xsl:variable name="amount"
		- select="format-number(../value, '###,###')"/>
		-
		- <xsl:variable name="percent"
		- select="format-number(../value div $total, '0.00%')"/>
		-
		- <tr class="wedge">
		- <td class="bullet">
		- <div class="bullet" style="background-color:{$colour}"/>
		- </td>
		- <td class="category"><xsl:value-of select="." /></td>
		- <td class="amount"><xsl:value-of select="$amount" /></td>
		- <td class="percent"><xsl:value-of select="$percent" /></td>
		- </tr>
		- </xsl:for-each>
		- </tbody>
		- <tfoot>
		- <tr>
		- <td></td>
		- <td class="total">Total</td>
		- <td class="footer">
		- <xsl:value-of select="format-number(footer/value, '###,###')"/>
		- </td>
		- </tr>
		- </tfoot>
		- </table>
		- <div class="legend">
		- </div>
		- </div>
		-</xsl:template>
		-
		-<!--
		- \| Creates a pie wedge path.
		- \|
		- \| http://www.svgopen.org/2003/papers/CreatingSVGPieChartsThroughWebService
		- \| http://jbkflex.wordpress.com/2011/07/28/creating-a-svg-pie-chart-html5
		- \| http://www.codestore.net/store.nsf/unid/epsd-5dtt4l
		- +-->
		-<xsl:template match="value" mode="piechart">
		- <!-- Colour of the pie wedge. -->
		- <xsl:param name="colour"/>
		- <!-- Sum of all the wedge values. -->
		- <xsl:param name="total"/>
		- <!-- Sum of all preceding wedge values. -->
		- <xsl:param name="runningTotal"/>
		- <!-- Pie radius. -->
		- <xsl:param name="radius"/>
		-
		- <!-- Hover text. -->
		- <xsl:variable name="title"
		- select="concat(../name,' (',format-number(., '###,###'),')')"/>
		-
		- <!-- Set the start and ending angles. -->
		- <xsl:variable name="sa"
		- select="360.0 * ($runningTotal div $total)"/>
		- <xsl:variable name="ea"
		- select="360.0 * (($runningTotal + .) div $total)"/>
		-
		- <!-- Calculate the starting Cartesian coordinate. -->
		- <xsl:variable name="x1">
		- <xsl:call-template name="sine">
		- <xsl:with-param name="degrees" select="-$sa"/>
		- </xsl:call-template>
		- </xsl:variable>
		- <xsl:variable name="y1">
		- <xsl:call-template name="sine">
		- <xsl:with-param name="degrees" select="(-$sa - 90)"/>
		- </xsl:call-template>
		- </xsl:variable>
		- <!-- Calculate the ending Cartesian coordinate. -->
		- <xsl:variable name="x2">
		- <xsl:call-template name="sine">
		- <xsl:with-param name="degrees" select="-$ea"/>
		- </xsl:call-template>
		- </xsl:variable>
		- <xsl:variable name="y2">
		- <xsl:call-template name="sine">
		- <xsl:with-param name="degrees" select="(-$ea - 90)"/>
		- </xsl:call-template>
		- </xsl:variable>
		-
		- <!-- Wedges with angles that exceed 180 degrees must be marked. -->
		- <xsl:variable name="sweep">
		- <xsl:choose>
		- <xsl:when test="($ea - $sa > 180)">1</xsl:when>
		- <xsl:otherwise>0</xsl:otherwise>
		- </xsl:choose>
		- </xsl:variable>
		-
		- <!-- Ensure the path's d attribute fits on a printed page. -->
		- <!-- Note: superfluous variables. -->
		- <xsl:variable name="r" select="$radius"/>
		- <xsl:variable name="x1r" select="$x1 * $r"/>
		- <xsl:variable name="y1r" select="$y1 * $r"/>
		- <xsl:variable name="x2r" select="$x2 * $r"/>
		- <xsl:variable name="y2r" select="$y2 * $r"/>
		-
		- <!-- Create the wedge path. -->
		- <path xmlns="http://www.w3.org/2000/svg"
		- fill="{$colour}"
		- title="{$title}"
		- stroke="{$stroke_colour}"
		- transform="translate({$radius},{$radius})"
		- d="M 0 0 L {$x1r} {$y1r} A {$r} {$r} 0 {$sweep} 0 {$x2r} {$y2r} Z"/>
		-</xsl:template>
		-
		-<xsl:template match="title" mode="piechart">
		-</xsl:template>
		-
		-</xsl:stylesheet>

xml/colour.xsl

		-<?xml version="1.0"?>
		-<!--
		- \| The MIT License
		- \|
		- \| Copyright 2014 White Magic Software, Inc.
		- \|
		- \| Permission is hereby granted, free of charge, to any person
		- \| obtaining a copy of this software and associated documentation
		- \| files (the "Software"), to deal in the Software without
		- \| restriction, including without limitation the rights to use,
		- \| copy, modify, merge, publish, distribute, sublicense, and/or
		- \| sell copies of the Software, and to permit persons to whom the
		- \| Software is furnished to do so, subject to the following
		- \| conditions:
		- \|
		- \| The above copyright notice and this permission notice shall be
		- \| included in all copies or substantial portions of the Software.
		- \|
		- \| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
		- \| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
		- \| OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
		- \| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
		- \| HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
		- \| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
		- \| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
		- \| OTHER DEALINGS IN THE SOFTWARE.
		- +-->
		-<xsl:stylesheet version="1.0"
		- xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
		-
		-<!-- Reference white (X, Y, and Z components) -->
		-<xsl:variable name="X_r" select="0.950456"/>
		-<xsl:variable name="Y_r" select="1.000000"/>
		-<xsl:variable name="Z_r" select="1.088754"/>
		-<xsl:variable name="LAB_EPSILON" select="216.0 div 24389.0"/>
		-<xsl:variable name="LAB_K" select="24389.0 div 27.0"/>
		-
		-<!-- Pie wedge colours based on this hue. -->
		-<xsl:variable name="base_colour" select="'46A5E5'"/>
		-
		-<!-- Pie wedge stroke colour. -->
		-<xsl:variable name="stroke_colour" select="'white'"/>
		-
		-<!--
		- \| Creates a colour for a particular pie wedge.
		- \|
		- \| http://en.wikipedia.org/wiki/HSL_and_HSV
		- +-->
		-<xsl:template name="fill">
		- <!-- Current wedge number for generating a colour. -->
		- <xsl:param name="wedge"/>
		- <!-- Total number of wedges in the pie. -->
		- <xsl:param name="wedges"/>
		- <!-- RGB colour in hexadecimal. -->
		- <xsl:param name="colour"/>
		-
		- <!-- Derive the colour decimal values from $colour's HEX code. -->
		- <xsl:variable name="r">
		- <xsl:call-template name="hex2dec">
		- <xsl:with-param name="hex"
		- select="substring( $colour, 1, 2 )"/>
		- </xsl:call-template>
		- </xsl:variable>
		- <xsl:variable name="g">
		- <xsl:call-template name="hex2dec">
		- <xsl:with-param name="hex"
		- select="substring( $colour, 3, 2 )"/>
		- </xsl:call-template>
		- </xsl:variable>
		- <xsl:variable name="b">
		- <xsl:call-template name="hex2dec">
		- <xsl:with-param name="hex"
		- select="substring( $colour, 5, 2 )"/>
		- </xsl:call-template>
		- </xsl:variable>
		-
		- <!--
		- \| Convert RGB to XYZ, using nominal range for RGB.
		- \| http://www.brucelindbloom.com/index.html?Eqn_RGB_to_XYZ.html
		- +-->
		- <xsl:variable name="r_n" select="$r div 255" />
		- <xsl:variable name="g_n" select="$g div 255" />
		- <xsl:variable name="b_n" select="$b div 255" />
		-
		- <!--
		- \| Assume colours are in sRGB.
		- \| http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html
		- -->
		- <xsl:variable name="x"
		- select=".4124564 * $r_n + .3575761 * $g_n + .1804375 * $b_n"/>
		- <xsl:variable name="y"
		- select=".2126729 * $r_n + .7151522 * $g_n + .0721750 * $b_n"/>
		- <xsl:variable name="z"
		- select=".0193339 * $r_n + .1191920 * $g_n + .9503041 * $b_n"/>
		-
		- <!--
		- \| Convert XYZ to Lab.
		- \| http://www.brucelindbloom.com/index.html?Eqn_XYZ_to_Lab.html
		- +-->
		- <xsl:variable name="if_x">
		- <xsl:call-template name="lab_f">
		- <xsl:with-param name="xyz_n" select="$x div $X_r"/>
		- </xsl:call-template>
		- </xsl:variable>
		- <xsl:variable name="if_y">
		- <xsl:call-template name="lab_f">
		- <xsl:with-param name="xyz_n" select="$y div $Y_r"/>
		- </xsl:call-template>
		- </xsl:variable>
		- <xsl:variable name="if_z">
		- <xsl:call-template name="lab_f">
		- <xsl:with-param name="xyz_n" select="$z div $Z_r"/>
		- </xsl:call-template>
		- </xsl:variable>
		-
		- <xsl:variable name="lab_l" select="(116.0 * $if_y) - 16.0"/>
		- <xsl:variable name="lab_a" select="500.0 * ($if_x - $if_y)"/>
		- <xsl:variable name="lab_b" select="200.0 * ($if_y - $if_z)"/>
		-
		- <!--
		- \| Convert Lab to LCH.
		- \| http://www.brucelindbloom.com/index.html?Eqn_Lab_to_LCH.html
		- +-->
		- <xsl:variable name="lch_l" select="$lab_l"/>
		-
		- <xsl:variable name="lch_c">
		- <xsl:call-template name="sqrt">
		- <xsl:with-param name="n" select="($lab_a * $lab_a) + ($lab_b * $lab_b)"/>
		- </xsl:call-template>
		- </xsl:variable>
		-
		- <xsl:variable name="lch_h">
		- <xsl:call-template name="atan2">
		- <xsl:with-param name="x" select="$lab_b"/>
		- <xsl:with-param name="y" select="$lab_a"/>
		- </xsl:call-template>
		- </xsl:variable>
		-
		- <!--
		- \| Prevent similar adjacent colours.
		- \|
		- \| wi = wedge index number
		- \| wt = total number of wedges
		- \| wte = evenness determiniate for wt
		- \|
		- \| http://math.stackexchange.com/a/936276/7932
		- +-->
		- <xsl:variable name="wi" select="$wedge"/>
		- <xsl:variable name="wt" select="$wedges"/>
		- <xsl:variable name="wtm" select="$wt mod 2"/>
		- <xsl:variable name="wte" select="$wt + (1 - $wtm)"/>
		-
		- <xsl:variable name="w" select="
		- round(($wi - $wtm) * floor( $wt div 2 ) mod $wte) + $wtm"/>
		-
		- <!-- lch_l, lch_c, and lch_h are now set; rotate the hue. -->
		- <xsl:variable name="lch_wedge_h" select="(360.0 div $wedges) * $w"/>
		-
		- <!--
		- \| Convert wedge's hue-adjusted LCH to Lab.
		- \| http://www.brucelindbloom.com/index.html?Eqn_LCH_to_Lab.html
		- +-->
		- <xsl:variable name="lab_sin_h">
		- <xsl:call-template name="sine">
		- <xsl:with-param name="degrees" select="$lch_wedge_h"/>
		- </xsl:call-template>
		- </xsl:variable>
		- <xsl:variable name="lab_cos_h">
		- <xsl:call-template name="cosine">
		- <xsl:with-param name="degrees" select="$lch_wedge_h"/>
		- </xsl:call-template>
		- </xsl:variable>
		-
		- <xsl:variable name="final_lab_l" select="$lch_l"/>
		- <xsl:variable name="final_lab_a" select="$lch_c * $lab_cos_h"/>
		- <xsl:variable name="final_lab_b" select="$lch_c * $lab_sin_h"/>
		-
		- <!--
		- \| Convert Lab to XYZ.
		- \| http://www.brucelindbloom.com/index.html?Eqn_Lab_to_XYZ.html
		- +-->
		- <xsl:variable name="of_y" select="($final_lab_l + 16.0) div 116.0"/>
		- <xsl:variable name="of_x" select="($final_lab_a div 500.0) + $of_y"/>
		- <xsl:variable name="of_z" select="$of_y - ($final_lab_b div 200.0)"/>
		-
		- <xsl:variable name="of_x_pow">
		- <xsl:call-template name="power">
		- <xsl:with-param name="base" select="$of_x"/>
		- <xsl:with-param name="exponent" select="3"/>
		- </xsl:call-template>
		- </xsl:variable>
		- <xsl:variable name="of_z_pow">
		- <xsl:call-template name="power">
		- <xsl:with-param name="base" select="$of_z"/>
		- <xsl:with-param name="exponent" select="3"/>
		- </xsl:call-template>
		- </xsl:variable>
		-
		- <xsl:variable name="ox_r">
		- <xsl:choose>
		- <xsl:when test="$of_x_pow > $LAB_EPSILON">
		- <xsl:value-of select="$of_x_pow"/>
		- </xsl:when>
		- <xsl:otherwise>
		- <xsl:value-of select="((116.0 * $of_x) - 16.0) div $LAB_K"/>
		- </xsl:otherwise>
		- </xsl:choose>
		- </xsl:variable>
		- <xsl:variable name="oy_r">
		- <xsl:choose>
		- <xsl:when test="$final_lab_l > ($LAB_K * $LAB_EPSILON)">
		- <xsl:call-template name="power">
		- <xsl:with-param name="base"
		- select="($final_lab_l + 16.0) div 116.0"/>
		- <xsl:with-param name="exponent"
		- select="3"/>
		- </xsl:call-template>
		- </xsl:when>
		- <xsl:otherwise>
		- <xsl:value-of select="$final_lab_l div $LAB_K"/>
		- </xsl:otherwise>
		- </xsl:choose>
		- </xsl:variable>
		- <xsl:variable name="oz_r">
		- <xsl:choose>
		- <xsl:when test="$of_z_pow > $LAB_EPSILON">
		- <xsl:value-of select="$of_z_pow"/>
		- </xsl:when>
		- <xsl:otherwise>
		- <xsl:value-of select="((116.0 * $of_z) - 16.0) div $LAB_K"/>
		- </xsl:otherwise>
		- </xsl:choose>
		- </xsl:variable>
		-
		- <xsl:variable name="X" select="$ox_r * $X_r"/>
		- <xsl:variable name="Y" select="$oy_r * $Y_r"/>
		- <xsl:variable name="Z" select="$oz_r * $Z_r"/>
		-
		- <!--
		- \| Convert XYZ to sRGB.
		- \| http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html
		- +-->
		- <xsl:variable name="R"
		- select="3.2404542 * $X + -1.5371385 * $Y + -0.4985314 * $Z"/>
		- <xsl:variable name="G"
		- select="-0.9692660 * $X + 1.8760108 * $Y + 0.0415560 * $Z"/>
		- <xsl:variable name="B"
		- select="0.0556434 * $X + -0.2040259 * $Y + 1.0572252 * $Z"/>
		-
		- <!-- Round the result. -->
		- <xsl:variable name="R_r" select="round( $R * 255 )"/>
		- <xsl:variable name="G_r" select="round( $G * 255 )"/>
		- <xsl:variable name="B_r" select="round( $B * 255 )"/>
		-
		- <xsl:text>rgb(</xsl:text>
		- <xsl:value-of select="concat( $R_r, ',', $G_r, ',', $B_r )"/>
		- <xsl:text>)</xsl:text>
		-</xsl:template>
		-
		-<xsl:template name="lab_f">
		- <xsl:param name="xyz_n"/>
		-
		- <xsl:choose>
		- <xsl:when test="$xyz_n > $LAB_EPSILON">
		- <xsl:call-template name="nthroot">
		- <xsl:with-param name="index" select="3"/>
		- <xsl:with-param name="radicand" select="$xyz_n"/>
		- </xsl:call-template>
		- </xsl:when>
		- <xsl:otherwise>
		- <xsl:value-of select="($LAB_K * $xyz_n + 16.0) div 116.0" />
		- </xsl:otherwise>
		- </xsl:choose>
		-</xsl:template>
		-
		-<!-- Converts a two-digit hexadecimal number to decimal. -->
		-<xsl:template name="hex2dec">
		- <xsl:param name="hex"/>
		-
		- <xsl:variable name="digits" select="'0123456789ABCDEF'"/>
		- <xsl:variable name="X" select="substring( $hex, 1, 1 )"/>
		- <xsl:variable name="Y" select="substring( $hex, 2, 1 )"/>
		- <xsl:variable name="Xval"
		- select="string-length(substring-before($digits,$X))"/>
		- <xsl:variable name="Yval"
		- select="string-length(substring-before($digits,$Y))"/>
		- <xsl:value-of select="16 * $Xval + $Yval"/>
		-</xsl:template>
		-
		-</xsl:stylesheet>

xml/common.xsl

		xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

		-<xsl:include href="chart.xsl"/>
		-<xsl:include href="tags.xsl"/>
		+<xsl:include href="xsl/chart.xsl"/>
		+<xsl:include href="xsl/tags.xsl"/>

		<xsl:output

xml/css/votes.css

		+.votes {
		+ display: flex;
		+ flex-direction: column;
		+ align-items: center;
		+
		+ float: left;
		+ margin-right: 1.5em;
		+ color: #A1C436;
		+ font-size: 14px;
		+}
		+
		+.votes::before {
		+ content: "▲";
		+ padding-bottom: 0.25em;
		+}
		+

xml/math.xsl

		-<?xml version="1.0"?>
		-<!--
		- \| The MIT License
		- \|
		- \| Copyright 2014 White Magic Software, Inc.
		- \|
		- \| Permission is hereby granted, free of charge, to any person
		- \| obtaining a copy of this software and associated documentation
		- \| files (the "Software"), to deal in the Software without
		- \| restriction, including without limitation the rights to use,
		- \| copy, modify, merge, publish, distribute, sublicense, and/or
		- \| sell copies of the Software, and to permit persons to whom the
		- \| Software is furnished to do so, subject to the following
		- \| conditions:
		- \|
		- \| The above copyright notice and this permission notice shall be
		- \| included in all copies or substantial portions of the Software.
		- \|
		- \| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
		- \| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
		- \| OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
		- \| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
		- \| HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
		- \| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
		- \| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
		- \| OTHER DEALINGS IN THE SOFTWARE.
		- +-->
		-<xsl:stylesheet version="1.0"
		- xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
		-
		-<xsl:variable name="PI">3.14159265358979323846264338327950</xsl:variable>
		-<xsl:variable name="PHI">1.61803398874989484820458683436564</xsl:variable>
		-<xsl:variable name="PIDIV2" select="$PI div 2.0"/>
		-<xsl:variable name="ROOT_PRECISION" select="0.00001"/>
		-
		-<!-- Calculates square root of n. -->
		-<xsl:template name="sqrt">
		- <!-- Number to root. -->
		- <xsl:param name="n" select="0"/>
		- <!-- Used internally. -->
		- <xsl:param name="try" select="1"/>
		- <!-- Maximum number of iterations (decreases recursively). -->
		- <xsl:param name="iter" select="17"/>
		-
		- <!-- Nate Austin's implementation using Newton's method -->
		- <xsl:choose>
		- <xsl:when test="($try * $try = $n) or ($iter = 0)">
		- <xsl:value-of select="$try"/>
		- </xsl:when>
		- <xsl:otherwise>
		- <xsl:call-template name="sqrt">
		- <xsl:with-param name="n"
		- select="$n"/>
		- <xsl:with-param name="try"
		- select="$try - (($try * $try - $n) div (2 * $try))"/>
		- <xsl:with-param name="iter"
		- select="$iter - 1"/>
		- </xsl:call-template>
		- </xsl:otherwise>
		- </xsl:choose>
		-</xsl:template>
		-
		-<!--
		- \| Calculates sin(x) as:
		- \| x(1 - (x^2/23)(1 - (x^2/45)(1 - (x^2/6*7))))
		- \| https://www.wolframalpha.com/input/?i=expand+sin(x)
		- +-->
		-<xsl:template name="sine">
		- <!-- Degrees (should be between 0 and 360). -->
		- <xsl:param name="degrees"/>
		- <!-- Convert degrees to radians when degrees are used. -->
		- <xsl:param name="rad" select="$degrees * $PI div 180"/>
		- <!-- Maximum number of iterations (decreases recursively). -->
		- <xsl:param name="iter" select="31"/>
		- <!-- Collects the value of all the terms. -->
		- <xsl:param name="result" select="1"/>
		-
		- <xsl:choose>
		- <xsl:when test="$iter > 2">
		- <xsl:call-template name="sine">
		- <xsl:with-param name="rad" select="$rad"/>
		- <xsl:with-param name="iter" select="$iter - 2"/>
		- <xsl:with-param name="result"
		- select="1 - ((($rad * $rad) div (($iter - 1) * $iter)) * $result)"/>
		- </xsl:call-template>
		- </xsl:when>
		- <xsl:otherwise><xsl:value-of select="$rad * $result"/></xsl:otherwise>
		- </xsl:choose>
		-</xsl:template>
		-
		-<!--
		- \| Calculates cos(x) as:
		- \| sine($PIDIV2 - $rad)
		- +-->
		-<xsl:template name="cosine">
		- <!-- Degrees (should be between 0 and 360). -->
		- <xsl:param name="degrees"/>
		- <!-- Convert degrees to radians when degrees are used. -->
		- <xsl:param name="rad" select="$degrees * $PI div 180"/>
		- <xsl:call-template name="sine">
		- <xsl:with-param name="rad" select="$PIDIV2 - $rad" />
		- </xsl:call-template>
		-</xsl:template>
		-
		-<!-- Calculates: normalized arc tangent form -->
		-<xsl:template name="atan2">
		- <xsl:param name="y"/>
		- <xsl:param name="x"/>
		- <!--
		- \| http://lists.apple.com/archives/PerfOptimization-dev/2005/Jan/msg00051.html
		- \| http://permalink.gmane.org/gmane.text.xml.xslt.extensions/840
		- +-->
		- <xsl:choose>
		- <xsl:when test="$x = 0.0">
		- <xsl:choose>
		- <xsl:when test="($y > 0.0)">
		- <xsl:value-of select="$PIDIV2"/>
		- </xsl:when>
		- <xsl:when test="($y < 0.0)">
		- <xsl:value-of select="-$PIDIV2"/>
		- </xsl:when>
		- <xsl:otherwise>
		- <xsl:value-of select="number(NaN)"/>
		- </xsl:otherwise>
		- </xsl:choose>
		- </xsl:when>
		- <xsl:otherwise>
		- <xsl:variable name="z"
		- select="$y div $x"/>
		- <xsl:variable name="absZ"
		- select="($z >= 0) * $z - not($z >= 0) * $z"/>
		- <xsl:choose>
		- <xsl:when test="($absZ < 1.0)">
		- <xsl:variable name="f1Z"
		- select="$z div (1.0 + 0.28$z$z)"/>
		- <xsl:choose>
		- <xsl:when test="($x < 0.0) and ($y < 0.0)">
		- <xsl:value-of select="$f1Z - $PI"/>
		- </xsl:when>
		- <xsl:when test="($x < 0.0)">
		- <xsl:value-of select="$f1Z + $PI"/>
		- </xsl:when>
		- <xsl:otherwise>
		- <xsl:value-of select="$f1Z"/>
		- </xsl:otherwise>
		- </xsl:choose>
		- </xsl:when>
		- <xsl:otherwise>
		- <xsl:variable name="f2Z"
		- select="$PIDIV2 - ($z div ($z*$z + 0.28))"/>
		- <xsl:choose>
		- <xsl:when test="($y < 0.0)">
		- <xsl:value-of select="$f2Z - $PI"/>
		- </xsl:when>
		- <xsl:otherwise>
		- <xsl:value-of select="$f2Z"/>
		- </xsl:otherwise>
		- </xsl:choose>
		- </xsl:otherwise>
		- </xsl:choose>
		- </xsl:otherwise>
		- </xsl:choose>
		-</xsl:template>
		-
		-<!-- Returns the larger of two values (a, b). -->
		-<xsl:template name="max">
		- <xsl:param name="a"/>
		- <xsl:param name="b"/>
		-
		- <xsl:choose>
		- <xsl:when test="$a > $b"><xsl:value-of select="$a"/></xsl:when>
		- <xsl:otherwise><xsl:value-of select="$b"/></xsl:otherwise>
		- </xsl:choose>
		-</xsl:template>
		-
		-<!-- Calculates: radicand^(1/index) -->
		-<!-- http://www.shodor.org/unchem/math/newton/ -->
		-<xsl:template name="nthroot">
		- <xsl:param name="index"/>
		- <xsl:param name="radicand"/>
		- <!-- Initial guess -->
		- <xsl:param name="guess" select="1 + (($radicand - 1) div $index)"/>
		-
		- <xsl:variable name="approx">
		- <xsl:call-template name="nthroot_approx">
		- <xsl:with-param name="guess" select="$guess"/>
		- <xsl:with-param name="index" select="$index"/>
		- <xsl:with-param name="radicand" select="$radicand"/>
		- </xsl:call-template>
		- </xsl:variable>
		-
		- <xsl:variable name="derivative">
		- <xsl:call-template name="nthroot_derivative">
		- <xsl:with-param name="guess" select="$guess"/>
		- <xsl:with-param name="index" select="$index"/>
		- </xsl:call-template>
		- </xsl:variable>
		-
		- <xsl:variable name="newGuess" select="$guess - $approx div $derivative"/>
		- <xsl:variable name="difference" select="$newGuess - $guess"/>
		- <xsl:variable name="precision" select="$guess * $ROOT_PRECISION"/>
		-
		- <xsl:variable name="abs_difference">
		- <xsl:call-template name="abs">
		- <xsl:with-param name="x" select="$difference"/>
		- </xsl:call-template>
		- </xsl:variable>
		-
		- <xsl:variable name="abs_precision">
		- <xsl:call-template name="abs">
		- <xsl:with-param name="x" select="$precision"/>
		- </xsl:call-template>
		- </xsl:variable>
		-
		- <xsl:choose>
		- <xsl:when test="$abs_difference < $abs_precision">
		- <xsl:value-of select="$newGuess"/>
		- </xsl:when>
		- <xsl:otherwise>
		- <xsl:call-template name="nthroot">
		- <xsl:with-param name="index" select="$index"/>
		- <xsl:with-param name="radicand" select="$radicand"/>
		- <xsl:with-param name="guess" select="$newGuess"/>
		- </xsl:call-template>
		- </xsl:otherwise>
		- </xsl:choose>
		-</xsl:template>
		-
		-<!-- Calculates: (guess ^ index) - radicand -->
		-<xsl:template name="nthroot_approx">
		- <xsl:param name="guess"/>
		- <xsl:param name="index"/>
		- <xsl:param name="radicand"/>
		-
		- <xsl:variable name="power">
		- <xsl:call-template name="power">
		- <xsl:with-param name="base" select="$guess"/>
		- <xsl:with-param name="exponent" select="$index"/>
		- </xsl:call-template>
		- </xsl:variable>
		-
		- <xsl:value-of select="$power - $radicand"/>
		-</xsl:template>
		-
		-<!-- Calculates: index * (guess ^ (index - 1)) -->
		-<xsl:template name="nthroot_derivative">
		- <xsl:param name="guess"/>
		- <xsl:param name="index"/>
		-
		- <xsl:variable name="power">
		- <xsl:call-template name="power">
		- <xsl:with-param name="base" select="$guess"/>
		- <xsl:with-param name="exponent" select="($index - 1)"/>
		- </xsl:call-template>
		- </xsl:variable>
		-
		- <xsl:value-of select="$index * $power"/>
		-</xsl:template>
		-
		-<!-- Calculates: base ^ exponent (whole number exponents) -->
		-<xsl:template name="power">
		- <xsl:param name="base"/>
		- <xsl:param name="exponent"/>
		- <xsl:choose>
		- <xsl:when test="$exponent = 0">
		- <xsl:value-of select="1"/>
		- </xsl:when>
		- <xsl:otherwise>
		- <xsl:variable name="t">
		- <xsl:call-template name="power">
		- <xsl:with-param name="base" select="$base"/>
		- <xsl:with-param name="exponent" select="$exponent - 1"/>
		- </xsl:call-template>
		- </xsl:variable>
		- <xsl:value-of select="$base * $t"/>
		- </xsl:otherwise>
		- </xsl:choose>
		-</xsl:template>
		-
		-<!-- Calculates: \|x\| -->
		-<!-- http://en.wikipedia.org/wiki/Absolute_value -->
		-<xsl:template name="abs">
		- <xsl:param name="x"/>
		- <xsl:value-of select="($x >= 0) * $x - not($x >= 0) * $x"/>
		-</xsl:template>
		-
		-</xsl:stylesheet>

xml/pages.xsl

		+<?xml version="1.0"?>
		+<!--
		+ \| The MIT License
		+ \|
		+ \| Copyright 2014 White Magic Software, Inc.
		+ \|
		+ \| Permission is hereby granted, free of charge, to any person
		+ \| obtaining a copy of this software and associated documentation
		+ \| files (the "Software"), to deal in the Software without
		+ \| restriction, including without limitation the rights to use,
		+ \| copy, modify, merge, publish, distribute, sublicense, and/or
		+ \| sell copies of the Software, and to permit persons to whom the
		+ \| Software is furnished to do so, subject to the following
		+ \| conditions:
		+ \|
		+ \| The above copyright notice and this permission notice shall be
		+ \| included in all copies or substantial portions of the Software.
		+ \|
		+ \| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
		+ \| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
		+ \| OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
		+ \| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
		+ \| HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
		+ \| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
		+ \| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
		+ \| OTHER DEALINGS IN THE SOFTWARE.
		+ +-->
		+<xsl:stylesheet version="2.0"
		+ xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
		+
		+<xsl:strip-space elements="*"/>
		+
		+<xsl:output method="text"/>
		+<xsl:output method="html" indent="yes" name="html" encoding="utf-8"/>
		+
		+<xsl:template match="/">
		+ <xsl:apply-templates />
		+</xsl:template>
		+
		+<xsl:template match="page">
		+<xsl:result-document href="{@file}.html" format="html">
		+<html>
		+<head>
		+ <meta charset="utf-8" />
		+ <link rel="stylesheet" type="text/css" href="css/tour.css" />
		+</head>
		+<body>
		+<div class="header">
		+ <xsl:if test="position() > 1">
		+ <a class="page-prev" href="{preceding-sibling::page[1]/@file}.html">Previous</a>
		+ </xsl:if>
		+ <xsl:if test="position() < last()">
		+ <a class="page-next" href="{following-sibling::page[1]/@file}.html">Next</a>
		+ </xsl:if>
		+</div>
		+<hr />
		+ <iframe id="page" src="{@file}.xml" width="100%" height="100%" frameborder="0">
		+ </iframe>
		+</body>
		+</html>
		+</xsl:result-document>
		+</xsl:template>
		+
		+</xsl:stylesheet>
		+

xml/tags.xsl

		-<?xml version="1.0"?>
		-<!--
		- \| The MIT License
		- \|
		- \| Copyright 2014 White Magic Software, Inc.
		- \|
		- \| Permission is hereby granted, free of charge, to any person
		- \| obtaining a copy of this software and associated documentation
		- \| files (the "Software"), to deal in the Software without
		- \| restriction, including without limitation the rights to use,
		- \| copy, modify, merge, publish, distribute, sublicense, and/or
		- \| sell copies of the Software, and to permit persons to whom the
		- \| Software is furnished to do so, subject to the following
		- \| conditions:
		- \|
		- \| The above copyright notice and this permission notice shall be
		- \| included in all copies or substantial portions of the Software.
		- \|
		- \| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
		- \| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
		- \| OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
		- \| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
		- \| HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
		- \| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
		- \| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
		- \| OTHER DEALINGS IN THE SOFTWARE.
		- +-->
		-<xsl:stylesheet version="1.0"
		- xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
		-
		-<!-- Override the match="*" from the common template by forcing priority. -->
		-<xsl:template match="taglist" priority="1">
		- <div class="columns">
		- <ul>
		- <xsl:apply-templates mode="tag"/>
		- </ul>
		- </div>
		- <div class="description">
		- <h1>Gas</h1>
		- <p>
		- The <b>gas</b> tag refers to
		- <a href="http://en.wikipedia.org/wiki/Natural_gas">natural gas</a>.
		- </p>
		- </div>
		- <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
		- <script src="js/columns.js"></script>
		-</xsl:template>
		-
		-<xsl:template match="tag" mode="tag">
		-<li>
		- <xsl:attribute name="id">
		- <xsl:value-of select="@id"/>
		- </xsl:attribute>
		- <xsl:value-of select="name"/>
		- <xsl:if test="tag">
		- <ul>
		- <xsl:apply-templates select="tag" mode="tag"/>
		- </ul>
		- </xsl:if>
		-</li>
		-</xsl:template>
		-
		-<!-- Ignore any nodes having nothing to do with tags. -->
		-<xsl:template match="*" mode="tag"/>
		-
		-<!-- Ignore the tags not in the correct mode. -->
		-<xsl:template match="taglist"/>
		-
		-</xsl:stylesheet>

xml/template.xsl

		-<?xml version="1.0"?>
		-<!--
		- \| The MIT License
		- \|
		- \| Copyright 2014 White Magic Software, Inc.
		- \|
		- \| Permission is hereby granted, free of charge, to any person
		- \| obtaining a copy of this software and associated documentation
		- \| files (the "Software"), to deal in the Software without
		- \| restriction, including without limitation the rights to use,
		- \| copy, modify, merge, publish, distribute, sublicense, and/or
		- \| sell copies of the Software, and to permit persons to whom the
		- \| Software is furnished to do so, subject to the following
		- \| conditions:
		- \|
		- \| The above copyright notice and this permission notice shall be
		- \| included in all copies or substantial portions of the Software.
		- \|
		- \| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
		- \| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
		- \| OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
		- \| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
		- \| HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
		- \| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
		- \| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
		- \| OTHER DEALINGS IN THE SOFTWARE.
		- +-->
		-<xsl:stylesheet version="2.0"
		- xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
		-
		-<xsl:strip-space elements="*"/>
		-
		-<xsl:output method="text"/>
		-<xsl:output method="html" indent="yes" name="html" encoding="utf-8"/>
		-
		-<xsl:template match="/">
		- <xsl:apply-templates />
		-</xsl:template>
		-
		-<xsl:template match="page">
		-<xsl:result-document href="{@file}.html" format="html">
		-<html>
		-<head>
		- <meta charset="utf-8" />
		- <link rel="stylesheet" type="text/css" href="css/tour.css" />
		-</head>
		-<body>
		-<div class="header">
		- <xsl:if test="position() > 1">
		- <a class="page-prev" href="{preceding-sibling::page[1]/@file}.html">Previous</a>
		- </xsl:if>
		- <xsl:if test="position() < last()">
		- <a class="page-next" href="{following-sibling::page[1]/@file}.html">Next</a>
		- </xsl:if>
		-</div>
		-<hr />
		- <iframe id="page" src="{@file}.xml" width="100%" height="100%" frameborder="0">
		- </iframe>
		-</body>
		-</html>
		-</xsl:result-document>
		-</xsl:template>
		-
		-</xsl:stylesheet>
		-

xml/tex/ch-page-proposal.tex


		\startsubsection[title={Revise}]
		- A rich text editor (such as
		- \href{Mercury}{https://github.com/jejacks0n/mercury/tree/mercury2},
		- \href{WYSIHTML5}{http://xing.github.io/wysihtml5/},
		- \href{hallojs}{http://hallojs.org/},
		- \href{AlohaJS}{http://aloha-editor.org/}, or
		- \href{redactor}{http://imperavi.com/redactor/}) provides
		- a word processing interface for direct content updates.
		+ A \href{rich text editor}{https://en.wikipedia.org/wiki/Online_rich-text_editor}
		+ provides a word processing interface for direct content updates.
		\stopsubsection

xml/xsl/chart.xsl

		+<?xml version="1.0"?>
		+<!--
		+ \| The MIT License
		+ \|
		+ \| Copyright 2014 White Magic Software, Inc.
		+ \|
		+ \| Permission is hereby granted, free of charge, to any person
		+ \| obtaining a copy of this software and associated documentation
		+ \| files (the "Software"), to deal in the Software without
		+ \| restriction, including without limitation the rights to use,
		+ \| copy, modify, merge, publish, distribute, sublicense, and/or
		+ \| sell copies of the Software, and to permit persons to whom the
		+ \| Software is furnished to do so, subject to the following
		+ \| conditions:
		+ \|
		+ \| The above copyright notice and this permission notice shall be
		+ \| included in all copies or substantial portions of the Software.
		+ \|
		+ \| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
		+ \| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
		+ \| OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
		+ \| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
		+ \| HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
		+ \| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
		+ \| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
		+ \| OTHER DEALINGS IN THE SOFTWARE.
		+ +-->
		+<xsl:stylesheet version="1.0"
		+ xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
		+
		+<xsl:include href="math.xsl"/>
		+<xsl:include href="colour.xsl"/>
		+
		+<!-- Pie chart width and height. -->
		+<xsl:variable name="width" select="200"/>
		+<xsl:variable name="height" select="$width"/>
		+
		+<xsl:template match="resources">
		+ <xsl:apply-templates mode="piechart"/>
		+</xsl:template>
		+
		+<xsl:template match="expenses">
		+ <div class="expenses">
		+ <xsl:apply-templates mode="piechart"/>
		+ <xsl:apply-templates select="dataset"/>
		+ </div>
		+</xsl:template>
		+
		+<xsl:template match="//dataset/*[name()='data' or name()='footer']/value">
		+ <div class="value"><xsl:value-of
		+ select="format-number(., '###,###')"/></div>
		+</xsl:template>
		+
		+<!-- Convert XML data into a pie chart. -->
		+<xsl:template match="dataset" mode="piechart">
		+ <!-- Number of wedges. -->
		+ <xsl:variable name="wedges" select="count(data)"/>
		+
		+ <!-- Calculate the sum of all wedge values. -->
		+ <xsl:variable name="total" select="sum(data//value)"/>
		+
		+ <div class="chart">
		+ <div class="graph">
		+ <svg width="{$width}" height="{$height}" version="1.1"
		+ xmlns="http://www.w3.org/2000/svg">
		+ <xsl:for-each select="data">
		+ <xsl:apply-templates select="value" mode="piechart">
		+ <xsl:with-param name="colour">
		+ <xsl:call-template name="fill">
		+ <xsl:with-param name="wedge" select="position()"/>
		+ <xsl:with-param name="wedges" select="$wedges"/>
		+ <xsl:with-param name="colour" select="$base_colour"/>
		+ </xsl:call-template>
		+ </xsl:with-param>
		+ <xsl:with-param name="total"
		+ select="$total"/>
		+ <xsl:with-param name="runningTotal"
		+ select="sum(preceding-sibling::data/value)"/>
		+ <xsl:with-param name="radius"
		+ select="$width * 0.5"/>
		+ </xsl:apply-templates>
		+ </xsl:for-each>
		+ </svg>
		+ </div>
		+
		+ <!-- SVG 1.1 has no text flow abilities. -->
		+ <table class="legend" id="legend" name="legend">
		+ <thead>
		+ <tr>
		+ <th colspan="2">Expense</th>
		+ <th>Amount</th>
		+ <th></th>
		+ </tr>
		+ </thead>
		+ <tbody>
		+ <xsl:for-each select="data//name">
		+ <xsl:variable name="colour">
		+ <xsl:call-template name="fill">
		+ <xsl:with-param name="wedge" select="position()"/>
		+ <xsl:with-param name="wedges" select="$wedges"/>
		+ <xsl:with-param name="colour" select="$base_colour"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+
		+ <xsl:variable name="amount"
		+ select="format-number(../value, '###,###')"/>
		+
		+ <xsl:variable name="percent"
		+ select="format-number(../value div $total, '0.00%')"/>
		+
		+ <tr class="wedge">
		+ <td class="bullet">
		+ <div class="bullet" style="background-color:{$colour}"/>
		+ </td>
		+ <td class="category"><xsl:value-of select="." /></td>
		+ <td class="amount"><xsl:value-of select="$amount" /></td>
		+ <td class="percent"><xsl:value-of select="$percent" /></td>
		+ </tr>
		+ </xsl:for-each>
		+ </tbody>
		+ <tfoot>
		+ <tr>
		+ <td></td>
		+ <td class="total">Total</td>
		+ <td class="footer">
		+ <xsl:value-of select="format-number(footer/value, '###,###')"/>
		+ </td>
		+ </tr>
		+ </tfoot>
		+ </table>
		+ <div class="legend">
		+ </div>
		+ </div>
		+</xsl:template>
		+
		+<!--
		+ \| Creates a pie wedge path.
		+ \|
		+ \| http://www.svgopen.org/2003/papers/CreatingSVGPieChartsThroughWebService
		+ \| http://jbkflex.wordpress.com/2011/07/28/creating-a-svg-pie-chart-html5
		+ \| http://www.codestore.net/store.nsf/unid/epsd-5dtt4l
		+ +-->
		+<xsl:template match="value" mode="piechart">
		+ <!-- Colour of the pie wedge. -->
		+ <xsl:param name="colour"/>
		+ <!-- Sum of all the wedge values. -->
		+ <xsl:param name="total"/>
		+ <!-- Sum of all preceding wedge values. -->
		+ <xsl:param name="runningTotal"/>
		+ <!-- Pie radius. -->
		+ <xsl:param name="radius"/>
		+
		+ <!-- Hover text. -->
		+ <xsl:variable name="title"
		+ select="concat(../name,' (',format-number(., '###,###'),')')"/>
		+
		+ <!-- Set the start and ending angles. -->
		+ <xsl:variable name="sa"
		+ select="360.0 * ($runningTotal div $total)"/>
		+ <xsl:variable name="ea"
		+ select="360.0 * (($runningTotal + .) div $total)"/>
		+
		+ <!-- Calculate the starting Cartesian coordinate. -->
		+ <xsl:variable name="x1">
		+ <xsl:call-template name="sine">
		+ <xsl:with-param name="degrees" select="-$sa"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+ <xsl:variable name="y1">
		+ <xsl:call-template name="sine">
		+ <xsl:with-param name="degrees" select="(-$sa - 90)"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+ <!-- Calculate the ending Cartesian coordinate. -->
		+ <xsl:variable name="x2">
		+ <xsl:call-template name="sine">
		+ <xsl:with-param name="degrees" select="-$ea"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+ <xsl:variable name="y2">
		+ <xsl:call-template name="sine">
		+ <xsl:with-param name="degrees" select="(-$ea - 90)"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+
		+ <!-- Wedges with angles that exceed 180 degrees must be marked. -->
		+ <xsl:variable name="sweep">
		+ <xsl:choose>
		+ <xsl:when test="($ea - $sa > 180)">1</xsl:when>
		+ <xsl:otherwise>0</xsl:otherwise>
		+ </xsl:choose>
		+ </xsl:variable>
		+
		+ <!-- Ensure the path's d attribute fits on a printed page. -->
		+ <!-- Note: superfluous variables. -->
		+ <xsl:variable name="r" select="$radius"/>
		+ <xsl:variable name="x1r" select="$x1 * $r"/>
		+ <xsl:variable name="y1r" select="$y1 * $r"/>
		+ <xsl:variable name="x2r" select="$x2 * $r"/>
		+ <xsl:variable name="y2r" select="$y2 * $r"/>
		+
		+ <!-- Create the wedge path. -->
		+ <path xmlns="http://www.w3.org/2000/svg"
		+ fill="{$colour}"
		+ title="{$title}"
		+ stroke="{$stroke_colour}"
		+ transform="translate({$radius},{$radius})"
		+ d="M 0 0 L {$x1r} {$y1r} A {$r} {$r} 0 {$sweep} 0 {$x2r} {$y2r} Z"/>
		+</xsl:template>
		+
		+<xsl:template match="title" mode="piechart">
		+</xsl:template>
		+
		+</xsl:stylesheet>

xml/xsl/colour.xsl

		+<?xml version="1.0"?>
		+<!--
		+ \| The MIT License
		+ \|
		+ \| Copyright 2014 White Magic Software, Inc.
		+ \|
		+ \| Permission is hereby granted, free of charge, to any person
		+ \| obtaining a copy of this software and associated documentation
		+ \| files (the "Software"), to deal in the Software without
		+ \| restriction, including without limitation the rights to use,
		+ \| copy, modify, merge, publish, distribute, sublicense, and/or
		+ \| sell copies of the Software, and to permit persons to whom the
		+ \| Software is furnished to do so, subject to the following
		+ \| conditions:
		+ \|
		+ \| The above copyright notice and this permission notice shall be
		+ \| included in all copies or substantial portions of the Software.
		+ \|
		+ \| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
		+ \| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
		+ \| OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
		+ \| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
		+ \| HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
		+ \| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
		+ \| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
		+ \| OTHER DEALINGS IN THE SOFTWARE.
		+ +-->
		+<xsl:stylesheet version="1.0"
		+ xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
		+
		+<!-- Reference white (X, Y, and Z components) -->
		+<xsl:variable name="X_r" select="0.950456"/>
		+<xsl:variable name="Y_r" select="1.000000"/>
		+<xsl:variable name="Z_r" select="1.088754"/>
		+<xsl:variable name="LAB_EPSILON" select="216.0 div 24389.0"/>
		+<xsl:variable name="LAB_K" select="24389.0 div 27.0"/>
		+
		+<!-- Pie wedge colours based on this hue. -->
		+<xsl:variable name="base_colour" select="'46A5E5'"/>
		+
		+<!-- Pie wedge stroke colour. -->
		+<xsl:variable name="stroke_colour" select="'white'"/>
		+
		+<!--
		+ \| Creates a colour for a particular pie wedge.
		+ \|
		+ \| http://en.wikipedia.org/wiki/HSL_and_HSV
		+ +-->
		+<xsl:template name="fill">
		+ <!-- Current wedge number for generating a colour. -->
		+ <xsl:param name="wedge"/>
		+ <!-- Total number of wedges in the pie. -->
		+ <xsl:param name="wedges"/>
		+ <!-- RGB colour in hexadecimal. -->
		+ <xsl:param name="colour"/>
		+
		+ <!-- Derive the colour decimal values from $colour's HEX code. -->
		+ <xsl:variable name="r">
		+ <xsl:call-template name="hex2dec">
		+ <xsl:with-param name="hex"
		+ select="substring( $colour, 1, 2 )"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+ <xsl:variable name="g">
		+ <xsl:call-template name="hex2dec">
		+ <xsl:with-param name="hex"
		+ select="substring( $colour, 3, 2 )"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+ <xsl:variable name="b">
		+ <xsl:call-template name="hex2dec">
		+ <xsl:with-param name="hex"
		+ select="substring( $colour, 5, 2 )"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+
		+ <!--
		+ \| Convert RGB to XYZ, using nominal range for RGB.
		+ \| http://www.brucelindbloom.com/index.html?Eqn_RGB_to_XYZ.html
		+ +-->
		+ <xsl:variable name="r_n" select="$r div 255" />
		+ <xsl:variable name="g_n" select="$g div 255" />
		+ <xsl:variable name="b_n" select="$b div 255" />
		+
		+ <!--
		+ \| Assume colours are in sRGB.
		+ \| http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html
		+ -->
		+ <xsl:variable name="x"
		+ select=".4124564 * $r_n + .3575761 * $g_n + .1804375 * $b_n"/>
		+ <xsl:variable name="y"
		+ select=".2126729 * $r_n + .7151522 * $g_n + .0721750 * $b_n"/>
		+ <xsl:variable name="z"
		+ select=".0193339 * $r_n + .1191920 * $g_n + .9503041 * $b_n"/>
		+
		+ <!--
		+ \| Convert XYZ to Lab.
		+ \| http://www.brucelindbloom.com/index.html?Eqn_XYZ_to_Lab.html
		+ +-->
		+ <xsl:variable name="if_x">
		+ <xsl:call-template name="lab_f">
		+ <xsl:with-param name="xyz_n" select="$x div $X_r"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+ <xsl:variable name="if_y">
		+ <xsl:call-template name="lab_f">
		+ <xsl:with-param name="xyz_n" select="$y div $Y_r"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+ <xsl:variable name="if_z">
		+ <xsl:call-template name="lab_f">
		+ <xsl:with-param name="xyz_n" select="$z div $Z_r"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+
		+ <xsl:variable name="lab_l" select="(116.0 * $if_y) - 16.0"/>
		+ <xsl:variable name="lab_a" select="500.0 * ($if_x - $if_y)"/>
		+ <xsl:variable name="lab_b" select="200.0 * ($if_y - $if_z)"/>
		+
		+ <!--
		+ \| Convert Lab to LCH.
		+ \| http://www.brucelindbloom.com/index.html?Eqn_Lab_to_LCH.html
		+ +-->
		+ <xsl:variable name="lch_l" select="$lab_l"/>
		+
		+ <xsl:variable name="lch_c">
		+ <xsl:call-template name="sqrt">
		+ <xsl:with-param name="n" select="($lab_a * $lab_a) + ($lab_b * $lab_b)"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+
		+ <xsl:variable name="lch_h">
		+ <xsl:call-template name="atan2">
		+ <xsl:with-param name="x" select="$lab_b"/>
		+ <xsl:with-param name="y" select="$lab_a"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+
		+ <!--
		+ \| Prevent similar adjacent colours.
		+ \|
		+ \| wi = wedge index number
		+ \| wt = total number of wedges
		+ \| wte = evenness determiniate for wt
		+ \|
		+ \| http://math.stackexchange.com/a/936276/7932
		+ +-->
		+ <xsl:variable name="wi" select="$wedge"/>
		+ <xsl:variable name="wt" select="$wedges"/>
		+ <xsl:variable name="wtm" select="$wt mod 2"/>
		+ <xsl:variable name="wte" select="$wt + (1 - $wtm)"/>
		+
		+ <xsl:variable name="w" select="
		+ round(($wi - $wtm) * floor( $wt div 2 ) mod $wte) + $wtm"/>
		+
		+ <!-- lch_l, lch_c, and lch_h are now set; rotate the hue. -->
		+ <xsl:variable name="lch_wedge_h" select="(360.0 div $wedges) * $w"/>
		+
		+ <!--
		+ \| Convert wedge's hue-adjusted LCH to Lab.
		+ \| http://www.brucelindbloom.com/index.html?Eqn_LCH_to_Lab.html
		+ +-->
		+ <xsl:variable name="lab_sin_h">
		+ <xsl:call-template name="sine">
		+ <xsl:with-param name="degrees" select="$lch_wedge_h"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+ <xsl:variable name="lab_cos_h">
		+ <xsl:call-template name="cosine">
		+ <xsl:with-param name="degrees" select="$lch_wedge_h"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+
		+ <xsl:variable name="final_lab_l" select="$lch_l"/>
		+ <xsl:variable name="final_lab_a" select="$lch_c * $lab_cos_h"/>
		+ <xsl:variable name="final_lab_b" select="$lch_c * $lab_sin_h"/>
		+
		+ <!--
		+ \| Convert Lab to XYZ.
		+ \| http://www.brucelindbloom.com/index.html?Eqn_Lab_to_XYZ.html
		+ +-->
		+ <xsl:variable name="of_y" select="($final_lab_l + 16.0) div 116.0"/>
		+ <xsl:variable name="of_x" select="($final_lab_a div 500.0) + $of_y"/>
		+ <xsl:variable name="of_z" select="$of_y - ($final_lab_b div 200.0)"/>
		+
		+ <xsl:variable name="of_x_pow">
		+ <xsl:call-template name="power">
		+ <xsl:with-param name="base" select="$of_x"/>
		+ <xsl:with-param name="exponent" select="3"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+ <xsl:variable name="of_z_pow">
		+ <xsl:call-template name="power">
		+ <xsl:with-param name="base" select="$of_z"/>
		+ <xsl:with-param name="exponent" select="3"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+
		+ <xsl:variable name="ox_r">
		+ <xsl:choose>
		+ <xsl:when test="$of_x_pow > $LAB_EPSILON">
		+ <xsl:value-of select="$of_x_pow"/>
		+ </xsl:when>
		+ <xsl:otherwise>
		+ <xsl:value-of select="((116.0 * $of_x) - 16.0) div $LAB_K"/>
		+ </xsl:otherwise>
		+ </xsl:choose>
		+ </xsl:variable>
		+ <xsl:variable name="oy_r">
		+ <xsl:choose>
		+ <xsl:when test="$final_lab_l > ($LAB_K * $LAB_EPSILON)">
		+ <xsl:call-template name="power">
		+ <xsl:with-param name="base"
		+ select="($final_lab_l + 16.0) div 116.0"/>
		+ <xsl:with-param name="exponent"
		+ select="3"/>
		+ </xsl:call-template>
		+ </xsl:when>
		+ <xsl:otherwise>
		+ <xsl:value-of select="$final_lab_l div $LAB_K"/>
		+ </xsl:otherwise>
		+ </xsl:choose>
		+ </xsl:variable>
		+ <xsl:variable name="oz_r">
		+ <xsl:choose>
		+ <xsl:when test="$of_z_pow > $LAB_EPSILON">
		+ <xsl:value-of select="$of_z_pow"/>
		+ </xsl:when>
		+ <xsl:otherwise>
		+ <xsl:value-of select="((116.0 * $of_z) - 16.0) div $LAB_K"/>
		+ </xsl:otherwise>
		+ </xsl:choose>
		+ </xsl:variable>
		+
		+ <xsl:variable name="X" select="$ox_r * $X_r"/>
		+ <xsl:variable name="Y" select="$oy_r * $Y_r"/>
		+ <xsl:variable name="Z" select="$oz_r * $Z_r"/>
		+
		+ <!--
		+ \| Convert XYZ to sRGB.
		+ \| http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html
		+ +-->
		+ <xsl:variable name="R"
		+ select="3.2404542 * $X + -1.5371385 * $Y + -0.4985314 * $Z"/>
		+ <xsl:variable name="G"
		+ select="-0.9692660 * $X + 1.8760108 * $Y + 0.0415560 * $Z"/>
		+ <xsl:variable name="B"
		+ select="0.0556434 * $X + -0.2040259 * $Y + 1.0572252 * $Z"/>
		+
		+ <!-- Round the result. -->
		+ <xsl:variable name="R_r" select="round( $R * 255 )"/>
		+ <xsl:variable name="G_r" select="round( $G * 255 )"/>
		+ <xsl:variable name="B_r" select="round( $B * 255 )"/>
		+
		+ <xsl:text>rgb(</xsl:text>
		+ <xsl:value-of select="concat( $R_r, ',', $G_r, ',', $B_r )"/>
		+ <xsl:text>)</xsl:text>
		+</xsl:template>
		+
		+<xsl:template name="lab_f">
		+ <xsl:param name="xyz_n"/>
		+
		+ <xsl:choose>
		+ <xsl:when test="$xyz_n > $LAB_EPSILON">
		+ <xsl:call-template name="nthroot">
		+ <xsl:with-param name="index" select="3"/>
		+ <xsl:with-param name="radicand" select="$xyz_n"/>
		+ </xsl:call-template>
		+ </xsl:when>
		+ <xsl:otherwise>
		+ <xsl:value-of select="($LAB_K * $xyz_n + 16.0) div 116.0" />
		+ </xsl:otherwise>
		+ </xsl:choose>
		+</xsl:template>
		+
		+<!-- Converts a two-digit hexadecimal number to decimal. -->
		+<xsl:template name="hex2dec">
		+ <xsl:param name="hex"/>
		+
		+ <xsl:variable name="digits" select="'0123456789ABCDEF'"/>
		+ <xsl:variable name="X" select="substring( $hex, 1, 1 )"/>
		+ <xsl:variable name="Y" select="substring( $hex, 2, 1 )"/>
		+ <xsl:variable name="Xval"
		+ select="string-length(substring-before($digits,$X))"/>
		+ <xsl:variable name="Yval"
		+ select="string-length(substring-before($digits,$Y))"/>
		+ <xsl:value-of select="16 * $Xval + $Yval"/>
		+</xsl:template>
		+
		+</xsl:stylesheet>

xml/xsl/math.xsl

		+<?xml version="1.0"?>
		+<!--
		+ \| The MIT License
		+ \|
		+ \| Copyright 2014 White Magic Software, Inc.
		+ \|
		+ \| Permission is hereby granted, free of charge, to any person
		+ \| obtaining a copy of this software and associated documentation
		+ \| files (the "Software"), to deal in the Software without
		+ \| restriction, including without limitation the rights to use,
		+ \| copy, modify, merge, publish, distribute, sublicense, and/or
		+ \| sell copies of the Software, and to permit persons to whom the
		+ \| Software is furnished to do so, subject to the following
		+ \| conditions:
		+ \|
		+ \| The above copyright notice and this permission notice shall be
		+ \| included in all copies or substantial portions of the Software.
		+ \|
		+ \| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
		+ \| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
		+ \| OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
		+ \| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
		+ \| HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
		+ \| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
		+ \| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
		+ \| OTHER DEALINGS IN THE SOFTWARE.
		+ +-->
		+<xsl:stylesheet version="1.0"
		+ xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
		+
		+<xsl:variable name="PI">3.14159265358979323846264338327950</xsl:variable>
		+<xsl:variable name="PHI">1.61803398874989484820458683436564</xsl:variable>
		+<xsl:variable name="PIDIV2" select="$PI div 2.0"/>
		+<xsl:variable name="ROOT_PRECISION" select="0.00001"/>
		+
		+<!-- Calculates square root of n. -->
		+<xsl:template name="sqrt">
		+ <!-- Number to root. -->
		+ <xsl:param name="n" select="0"/>
		+ <!-- Used internally. -->
		+ <xsl:param name="try" select="1"/>
		+ <!-- Maximum number of iterations (decreases recursively). -->
		+ <xsl:param name="iter" select="17"/>
		+
		+ <!-- Nate Austin's implementation using Newton's method -->
		+ <xsl:choose>
		+ <xsl:when test="($try * $try = $n) or ($iter = 0)">
		+ <xsl:value-of select="$try"/>
		+ </xsl:when>
		+ <xsl:otherwise>
		+ <xsl:call-template name="sqrt">
		+ <xsl:with-param name="n"
		+ select="$n"/>
		+ <xsl:with-param name="try"
		+ select="$try - (($try * $try - $n) div (2 * $try))"/>
		+ <xsl:with-param name="iter"
		+ select="$iter - 1"/>
		+ </xsl:call-template>
		+ </xsl:otherwise>
		+ </xsl:choose>
		+</xsl:template>
		+
		+<!--
		+ \| Calculates sin(x) as:
		+ \| x(1 - (x^2/23)(1 - (x^2/45)(1 - (x^2/6*7))))
		+ \| https://www.wolframalpha.com/input/?i=expand+sin(x)
		+ +-->
		+<xsl:template name="sine">
		+ <!-- Degrees (should be between 0 and 360). -->
		+ <xsl:param name="degrees"/>
		+ <!-- Convert degrees to radians when degrees are used. -->
		+ <xsl:param name="rad" select="$degrees * $PI div 180"/>
		+ <!-- Maximum number of iterations (decreases recursively). -->
		+ <xsl:param name="iter" select="31"/>
		+ <!-- Collects the value of all the terms. -->
		+ <xsl:param name="result" select="1"/>
		+
		+ <xsl:choose>
		+ <xsl:when test="$iter > 2">
		+ <xsl:call-template name="sine">
		+ <xsl:with-param name="rad" select="$rad"/>
		+ <xsl:with-param name="iter" select="$iter - 2"/>
		+ <xsl:with-param name="result"
		+ select="1 - ((($rad * $rad) div (($iter - 1) * $iter)) * $result)"/>
		+ </xsl:call-template>
		+ </xsl:when>
		+ <xsl:otherwise><xsl:value-of select="$rad * $result"/></xsl:otherwise>
		+ </xsl:choose>
		+</xsl:template>
		+
		+<!--
		+ \| Calculates cos(x) as:
		+ \| sine($PIDIV2 - $rad)
		+ +-->
		+<xsl:template name="cosine">
		+ <!-- Degrees (should be between 0 and 360). -->
		+ <xsl:param name="degrees"/>
		+ <!-- Convert degrees to radians when degrees are used. -->
		+ <xsl:param name="rad" select="$degrees * $PI div 180"/>
		+ <xsl:call-template name="sine">
		+ <xsl:with-param name="rad" select="$PIDIV2 - $rad" />
		+ </xsl:call-template>
		+</xsl:template>
		+
		+<!-- Calculates: normalized arc tangent form -->
		+<xsl:template name="atan2">
		+ <xsl:param name="y"/>
		+ <xsl:param name="x"/>
		+ <!--
		+ \| http://lists.apple.com/archives/PerfOptimization-dev/2005/Jan/msg00051.html
		+ \| http://permalink.gmane.org/gmane.text.xml.xslt.extensions/840
		+ +-->
		+ <xsl:choose>
		+ <xsl:when test="$x = 0.0">
		+ <xsl:choose>
		+ <xsl:when test="($y > 0.0)">
		+ <xsl:value-of select="$PIDIV2"/>
		+ </xsl:when>
		+ <xsl:when test="($y < 0.0)">
		+ <xsl:value-of select="-$PIDIV2"/>
		+ </xsl:when>
		+ <xsl:otherwise>
		+ <xsl:value-of select="number(NaN)"/>
		+ </xsl:otherwise>
		+ </xsl:choose>
		+ </xsl:when>
		+ <xsl:otherwise>
		+ <xsl:variable name="z"
		+ select="$y div $x"/>
		+ <xsl:variable name="absZ"
		+ select="($z >= 0) * $z - not($z >= 0) * $z"/>
		+ <xsl:choose>
		+ <xsl:when test="($absZ < 1.0)">
		+ <xsl:variable name="f1Z"
		+ select="$z div (1.0 + 0.28$z$z)"/>
		+ <xsl:choose>
		+ <xsl:when test="($x < 0.0) and ($y < 0.0)">
		+ <xsl:value-of select="$f1Z - $PI"/>
		+ </xsl:when>
		+ <xsl:when test="($x < 0.0)">
		+ <xsl:value-of select="$f1Z + $PI"/>
		+ </xsl:when>
		+ <xsl:otherwise>
		+ <xsl:value-of select="$f1Z"/>
		+ </xsl:otherwise>
		+ </xsl:choose>
		+ </xsl:when>
		+ <xsl:otherwise>
		+ <xsl:variable name="f2Z"
		+ select="$PIDIV2 - ($z div ($z*$z + 0.28))"/>
		+ <xsl:choose>
		+ <xsl:when test="($y < 0.0)">
		+ <xsl:value-of select="$f2Z - $PI"/>
		+ </xsl:when>
		+ <xsl:otherwise>
		+ <xsl:value-of select="$f2Z"/>
		+ </xsl:otherwise>
		+ </xsl:choose>
		+ </xsl:otherwise>
		+ </xsl:choose>
		+ </xsl:otherwise>
		+ </xsl:choose>
		+</xsl:template>
		+
		+<!-- Returns the larger of two values (a, b). -->
		+<xsl:template name="max">
		+ <xsl:param name="a"/>
		+ <xsl:param name="b"/>
		+
		+ <xsl:choose>
		+ <xsl:when test="$a > $b"><xsl:value-of select="$a"/></xsl:when>
		+ <xsl:otherwise><xsl:value-of select="$b"/></xsl:otherwise>
		+ </xsl:choose>
		+</xsl:template>
		+
		+<!-- Calculates: radicand^(1/index) -->
		+<!-- http://www.shodor.org/unchem/math/newton/ -->
		+<xsl:template name="nthroot">
		+ <xsl:param name="index"/>
		+ <xsl:param name="radicand"/>
		+ <!-- Initial guess -->
		+ <xsl:param name="guess" select="1 + (($radicand - 1) div $index)"/>
		+
		+ <xsl:variable name="approx">
		+ <xsl:call-template name="nthroot_approx">
		+ <xsl:with-param name="guess" select="$guess"/>
		+ <xsl:with-param name="index" select="$index"/>
		+ <xsl:with-param name="radicand" select="$radicand"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+
		+ <xsl:variable name="derivative">
		+ <xsl:call-template name="nthroot_derivative">
		+ <xsl:with-param name="guess" select="$guess"/>
		+ <xsl:with-param name="index" select="$index"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+
		+ <xsl:variable name="newGuess" select="$guess - $approx div $derivative"/>
		+ <xsl:variable name="difference" select="$newGuess - $guess"/>
		+ <xsl:variable name="precision" select="$guess * $ROOT_PRECISION"/>
		+
		+ <xsl:variable name="abs_difference">
		+ <xsl:call-template name="abs">
		+ <xsl:with-param name="x" select="$difference"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+
		+ <xsl:variable name="abs_precision">
		+ <xsl:call-template name="abs">
		+ <xsl:with-param name="x" select="$precision"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+
		+ <xsl:choose>
		+ <xsl:when test="$abs_difference < $abs_precision">
		+ <xsl:value-of select="$newGuess"/>
		+ </xsl:when>
		+ <xsl:otherwise>
		+ <xsl:call-template name="nthroot">
		+ <xsl:with-param name="index" select="$index"/>
		+ <xsl:with-param name="radicand" select="$radicand"/>
		+ <xsl:with-param name="guess" select="$newGuess"/>
		+ </xsl:call-template>
		+ </xsl:otherwise>
		+ </xsl:choose>
		+</xsl:template>
		+
		+<!-- Calculates: (guess ^ index) - radicand -->
		+<xsl:template name="nthroot_approx">
		+ <xsl:param name="guess"/>
		+ <xsl:param name="index"/>
		+ <xsl:param name="radicand"/>
		+
		+ <xsl:variable name="power">
		+ <xsl:call-template name="power">
		+ <xsl:with-param name="base" select="$guess"/>
		+ <xsl:with-param name="exponent" select="$index"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+
		+ <xsl:value-of select="$power - $radicand"/>
		+</xsl:template>
		+
		+<!-- Calculates: index * (guess ^ (index - 1)) -->
		+<xsl:template name="nthroot_derivative">
		+ <xsl:param name="guess"/>
		+ <xsl:param name="index"/>
		+
		+ <xsl:variable name="power">
		+ <xsl:call-template name="power">
		+ <xsl:with-param name="base" select="$guess"/>
		+ <xsl:with-param name="exponent" select="($index - 1)"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+
		+ <xsl:value-of select="$index * $power"/>
		+</xsl:template>
		+
		+<!-- Calculates: base ^ exponent (whole number exponents) -->
		+<xsl:template name="power">
		+ <xsl:param name="base"/>
		+ <xsl:param name="exponent"/>
		+ <xsl:choose>
		+ <xsl:when test="$exponent = 0">
		+ <xsl:value-of select="1"/>
		+ </xsl:when>
		+ <xsl:otherwise>
		+ <xsl:variable name="t">
		+ <xsl:call-template name="power">
		+ <xsl:with-param name="base" select="$base"/>
		+ <xsl:with-param name="exponent" select="$exponent - 1"/>
		+ </xsl:call-template>
		+ </xsl:variable>
		+ <xsl:value-of select="$base * $t"/>
		+ </xsl:otherwise>
		+ </xsl:choose>
		+</xsl:template>
		+
		+<!-- Calculates: \|x\| -->
		+<!-- http://en.wikipedia.org/wiki/Absolute_value -->
		+<xsl:template name="abs">
		+ <xsl:param name="x"/>
		+ <xsl:value-of select="($x >= 0) * $x - not($x >= 0) * $x"/>
		+</xsl:template>
		+
		+</xsl:stylesheet>

xml/xsl/tags.xsl

		+<?xml version="1.0"?>
		+<!--
		+ \| The MIT License
		+ \|
		+ \| Copyright 2014 White Magic Software, Inc.
		+ \|
		+ \| Permission is hereby granted, free of charge, to any person
		+ \| obtaining a copy of this software and associated documentation
		+ \| files (the "Software"), to deal in the Software without
		+ \| restriction, including without limitation the rights to use,
		+ \| copy, modify, merge, publish, distribute, sublicense, and/or
		+ \| sell copies of the Software, and to permit persons to whom the
		+ \| Software is furnished to do so, subject to the following
		+ \| conditions:
		+ \|
		+ \| The above copyright notice and this permission notice shall be
		+ \| included in all copies or substantial portions of the Software.
		+ \|
		+ \| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
		+ \| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
		+ \| OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
		+ \| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
		+ \| HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
		+ \| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
		+ \| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
		+ \| OTHER DEALINGS IN THE SOFTWARE.
		+ +-->
		+<xsl:stylesheet version="1.0"
		+ xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
		+
		+<!-- Override the match="*" from the common template by forcing priority. -->
		+<xsl:template match="taglist" priority="1">
		+ <div class="columns">
		+ <ul>
		+ <xsl:apply-templates mode="tag"/>
		+ </ul>
		+ </div>
		+ <div class="description">
		+ <h1>Gas</h1>
		+ <p>
		+ The <b>gas</b> tag refers to
		+ <a href="http://en.wikipedia.org/wiki/Natural_gas">natural gas</a>.
		+ </p>
		+ </div>
		+ <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
		+ <script src="js/columns.js"></script>
		+</xsl:template>
		+
		+<xsl:template match="tag" mode="tag">
		+<li>
		+ <xsl:attribute name="id">
		+ <xsl:value-of select="@id"/>
		+ </xsl:attribute>
		+ <xsl:value-of select="name"/>
		+ <xsl:if test="tag">
		+ <ul>
		+ <xsl:apply-templates select="tag" mode="tag"/>
		+ </ul>
		+ </xsl:if>
		+</li>
		+</xsl:template>
		+
		+<!-- Ignore any nodes having nothing to do with tags. -->
		+<xsl:template match="*" mode="tag"/>
		+
		+<!-- Ignore the tags not in the correct mode. -->
		+<xsl:template match="taglist"/>
		+
		+</xsl:stylesheet>

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