Number generation and formatting in XSL

The Stylesheet 1 demonstrates a default behaviour of the xsl:number element. Numbering of the individual chapter elements depends on the position of a chapter element. Each levels of the chapter is numbered independently. Setting an attribute level into multiple in Stylesheet 2 do enables the more natural numbering.

XML source

<?xml version="1.0"?>
<xslTutorial >

<chapter>First Chapter</chapter>

<chapter>Second Chapter
<chapter>Subchapter 1</chapter>
<chapter>Subchapter 2</chapter>
</chapter>

<chapter>Third Chapter
<chapter>Subchapter A</chapter>

<chapter>Subchapter B
<chapter>sub a</chapter>
<chapter>sub b</chapter>
</chapter>

<chapter>Subchapter C</chapter>
</chapter>
</xslTutorial>

HTML output 1

<HTML>
<HEAD> </HEAD>
<BODY>
<TABLE BORDER="1">
TR>
<TH>Number</TH>
; <TH>text</TH></TR>
<TR>
<TD>1</TD>
<TD>First Chapter</TD></TR>
<TR>
<TD>2</TD>
<TD>Second Chapter </TD></TR>
<TR>
<TD>1</TD>
<TD>Subchapter 1</TD></TR>
<TR>
<TD>2</TD>
<TD>Subchapter 2</TD></TR>
<TR>
<TD>3</TD>
<TD>Third Chapter </TD></TR>
<TR>
<TD>1</TD>
<TD>Subchapter A</TD></TR>
<TR>
<TD>2</TD>
<TD>Subchapter B </TD></TR>
<TR>
<TD>1</TD>
<TD>sub a</TD></TR>
<TR>
<TD>2</TD>
<TD>sub b</TD></TR>
<TR>
<TD>3</TD>
<TD>Subchapter C</TD></TR>
</TABLE>
</BODY>
</HTML>

HTML output 2

<HTML>
<HEAD> </HEAD>
<BODY>
<TABLE BORDER="1">
<TR>
<TH>Number</TH>
<TH>text</TH></TR>
<TR>
<TD>1</TD>
<TD>First Chapter</TD></TR>
<TR>
<TD>2</TD>
<TD>Second Chapter </TD></TR>
<TR>
<TD>2.1</TD>
<TD>Subchapter 1</TD></TR>
<TR>
<TD>2.2</TD>
<TD>Subchapter 2</TD></TR>
<TR>
<TD>3</TD>
<TD>Third Chapter </TD></TR>
<TR>
<TD>3.1</TD>
<TD>Subchapter A</TD></TR>
<TR>
<TD>3.2</TD>
<TD>Subchapter B </TD></TR>
<TR>
<TD>3.2.1</TD>
<TD>sub a</TD></TR>
<TR>
<TD>3.2.2</TD>
<TD>sub b</TD></TR>
<TR>
<TD>3.3</TD>
<TD>Subchapter C</TD></TR>
</TABLE>
</BODY>
</HTML>

XSL stylesheet 1

<xsl:stylesheet xmlns:xsl='http://www.w3.org/1999/XSL/Transform' >
<xsl:template match="/">
<TABLE BORDER="1">
<TR><TH>Number</TH><TH>text</TH></TR>
<xsl:for-each select="//chapter">
<TR><TD>
<xsl:number/ >
</TD><TD>
<xsl:value-of select="./text()"/>
</TD></TR>
</xsl:for-each>
</TABLE>
</xsl:template>
</xsl:stylesheet>

XSL stylesheet 2

<xsl:stylesheet xmlns:xsl='http://www.w3.org/1999/XSL/Transform' > <xsl:template match="/">
<TABLE BORDER="1">
<TR><TH>Number</TH><TH>text</TH></TR>
<xsl:for-each select="//chapter">
<TR><TD>
<xsl:number level="multiple"/>
</TD><TD>
<xsl:value-of select="./text()"/>
</TD></TR>
</xsl:for-each>
</TABLE>
</xsl:template>
</xsl:stylesheet>

The Format Attribute

An xsl:numbers do inserts a formated numbers into the output. Format is given with the format attribute. An attribute starts with a format identificator followed by separator characters.

XML source

<?xml version="1.0"?>
<xslTutorial >
<n>one</n>
<n>two</n>
<n>three</n>
<n>four</n>
</xslTutorial>

HTML output 1

<HTML>
<HEAD> </HEAD>
<BODY>
<TABLE>
<TR>
<TD>1. one</TD></TR>
<TR>
<TD>2. two</TD></TR>
<TR>
<TD>3. three</TD></TR>
<TR>
<TD>4. four</TD></TR>
</TABLE>
</BODY>
</HTML>

XSL stylesheet 1

<xsl:stylesheet xmlns:xsl='http://www.w3.org/1999/XSL/Transform' >
<xsl:template match="/">
<TABLE>
<xsl:for-each select="//n">
<TR><TD>
<xsl:number value="position()" format="1. "/>
<xsl:value-of select="."/>
</TD></TR>
</xsl:for-each>
</TABLE>
</xsl:template>
</xsl:stylesheet>

Formatting The Multilevel Numbers

The Stylesheet 1 and the Stylesheet 2 are the examples of formatting a multilevel numbers.

HTML output 1

<HTML>
<HEAD> </HEAD>
<BODY>
<TABLE BORDER="1">
<TR>
<TH>Number</TH>
<TH>text</TH></TR>
<TR>
<TD>1 </TD>
<TD>First Chapter</TD></TR>
<TR>
<TD>2 </TD>
<TD>Second Chapter </TD></TR>
<TR>
<TD>2.A </TD>
<TD>Subchapter 1</TD></TR>
<TR>
<TD>2.B </TD>
<TD>Subchapter 2</TD></TR>
<TR>
<TD>3 </TD>
<TD>Third Chapter </TD></TR>
<TR>
<TD>3.A </TD>
<TD>Subchapter A</TD></TR>
<TR>
<TD>3.B </TD>
<TD>Subchapter B </TD></TR>
<TR>
<TD>3.B.a </TD>
<TD>sub a</TD></TR>
<TR>
<TD>3.B.b </TD>
<TD>sub b</TD></TR>
<TR>
<TD>3.C </TD>
<TD>Subchapter C</TD></TR>
</TABLE>
</BODY>
</HTML>

HTML output 2

<HTML>
<HEAD> </HEAD>
<BODY>
<TABLE BORDER="1">
<TR>
<TH>Number</TH>
<TH>text</TH></TR>
<TR>
<TD>I:</TD>
<TD>First Chapter</TD></TR>
<TR>
<TD>II:</TD>
<TD>Second Chapter </TD></TR>
<TR>
<TD>II-1:</TD>
<TD>Subchapter 1</TD></TR>
<TR>
<TD>II-2:</TD>
<TD>Subchapter 2</TD></TR>
<TR>
<TD>III:</TD>
<TD>Third Chapter </TD></TR>
<TR>
<TD>III-1:</TD>
<TD>Subchapter A</TD></TR>
<TR>
<TD>III-2:</TD>
<TD>Subchapter B <TR>
<TD>III-2-a:</TD>
<TD>sub a</TD></TR>
<TR>
<TD>III-2-b:</TD>
<TD>sub b</TD></TR>
<TR>
<TD>III-3:</TD>
<TD>Subchapter C</TD></TR>
</TABLE>
</BODY>
</HTML>

XSL stylesheet 1

<xsl:stylesheet xmlns:xsl='http://www.w3.org/1999/XSL/Transform' >
<xsl:template match="/">
<TABLE BORDER="1">
<TR><TH>Number</TH><TH>text</TH></TR>
<xsl:for-each select="//chapter">
<TR><TD>
<xsl:number level="multiple" format="1.A.a "/>
</TD><TD>
<xsl:value-of select="./text()"/>
</TD></TR>
</xsl:for-each>
</TABLE>
</xsl:template>
</xsl:stylesheet>

XSL stylesheet 2

<xsl:stylesheet xmlns:xsl='http://www.w3.org/1999/XSL/Transform' >
<xsl:template match="/">
<TABLE BORDER="1">
<TR><TH>Number</TH><TH>text</TH></TR>
<xsl:for-each select="//chapter">
<TR><TD>
<xsl:number level="multiple" format="I-1-a:"/>
</TD><TD>
<xsl:value-of select="./text()"/>
</TD></TR>
</xsl:for-each>
</TABLE>
</xsl:template>
</xsl:stylesheet>

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