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Processing always starts with the template match="/" . This matches the root node (the node its only element child is the document element, in our case "source"). Many stylesheets do not contain this element explicitly. When this template is not explicitly given, the implicit template is used (it contains as the sole instruction). This instruction means: process all children of the current node, including text nodes. Compare XSLT stylesheet 1 and XSLT stylesheet 2 . When a template for the node exists, there is no default processing invoked ( XSLT stylesheet 3 ). If you want to include descendants of the node, you have to explicitly request their templates ( XSLT stylesheet 4 ).

XSLT stylesheet 1

XML Source
<source>

<AAA id="a1" pos="start">
     <BBB id="b1"/>
     <BBB id="b2"/>
</AAA>
<AAA id="a2">
     <BBB id="b3"/>
     <BBB id="b4"/>
     <CCC id="c1">
          <DDD id="d1"/>
     </CCC>
     <BBB id="b5">
          <CCC id="c2"/>
     </BBB>
</AAA>

</source>

Output
<div style="color:purple">AAA id=a1</div>

<div style="color:purple">AAA id=a2</div>

HTML view
AAA id=a1
AAA id=a2
XSLT stylesheet
<xsl:stylesheet version = '1.0'
     xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>

<xsl:template match="AAA">
     <div style="color:purple">
          <xsl:value-of select="name()"/>
          <xsl:text> id=</xsl:text>
          <xsl:value-of select="@id"/>
     </div>
</xsl:template>


</xsl:stylesheet>


XSLT stylesheet 2

XML Source
<source>

<AAA id="a1" pos="start">
     <BBB id="b1"/>
     <BBB id="b2"/>
</AAA>
<AAA id="a2">
     <BBB id="b3"/>
     <BBB id="b4"/>
     <CCC id="c1">
          <DDD id="d1"/>
     </CCC>
     <BBB id="b5">
          <CCC id="c2"/>
     </BBB>
</AAA>

</source>

Output
<div style="color:purple">AAA id=a1</div>

<div style="color:purple">AAA id=a2</div>

HTML view
AAA id=a1
AAA id=a2
XSLT stylesheet
<xsl:stylesheet version = '1.0'
     xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>

<xsl:template match="/">
     <xsl:apply-templates/>
</xsl:template>

<xsl:template match="/source">
     <xsl:apply-templates/>
</xsl:template>

<xsl:template match="AAA">
     <div style="color:purple">
          <xsl:value-of select="name()"/>
          <xsl:text> id=</xsl:text>
          <xsl:value-of select="@id"/>
     </div>
</xsl:template>


</xsl:stylesheet>


XSLT stylesheet 3

XML Source
<source>

<AAA id="a1" pos="start">
     <BBB id="b1"/>
     <BBB id="b2"/>
</AAA>
<AAA id="a2">
     <BBB id="b3"/>
     <BBB id="b4"/>
     <CCC id="c1">
          <DDD id="d1"/>
     </CCC>
     <BBB id="b5">
          <CCC id="c2"/>
     </BBB>
</AAA>

</source>

Output
<div style="color:purple">AAA id=a1</div>

<div style="color:purple">AAA id=a2</div>

HTML view
AAA id=a1
AAA id=a2
XSLT stylesheet
<xsl:stylesheet version = '1.0'
     xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>

<xsl:template match="AAA">
     <div style="color:purple">
          <xsl:value-of select="name()"/>
          <xsl:text> id=</xsl:text>
          <xsl:value-of select="@id"/>
     </div>
</xsl:template>

<xsl:template match="BBB">
     <div style="color:blue">
          <xsl:value-of select="name()"/>
          <xsl:text> id=</xsl:text>
          <xsl:value-of select="@id"/>
     </div>
</xsl:template>

<xsl:template match="CCC">
     <div style="color:maroon">
          <xsl:value-of select="name()"/>
          <xsl:text> id=</xsl:text>
          <xsl:value-of select="@id"/>
     </div>
</xsl:template>

<xsl:template match="DDD">
     <div style="color:green">
          <xsl:value-of select="name()"/>
          <xsl:text> id=</xsl:text>
          <xsl:value-of select="@id"/>
     </div>
</xsl:template>


</xsl:stylesheet>


XSLT stylesheet 4

XML Source
<source>

<AAA id="a1" pos="start">
     <BBB id="b1"/>
     <BBB id="b2"/>
</AAA>
<AAA id="a2">
     <BBB id="b3"/>
     <BBB id="b4"/>
     <CCC id="c1">
          <DDD id="d1"/>
     </CCC>
     <BBB id="b5">
          <CCC id="c2"/>
     </BBB>
</AAA>

</source>

Output
<div style="color:purple">AAA id=a1</div>

<div style="color:blue">BBB id=b1</div>

<div style="color:blue">BBB id=b2</div>


<div style="color:purple">AAA id=a2</div>

<div style="color:blue">BBB id=b3</div>

<div style="color:blue">BBB id=b4</div>

<div style="color:maroon">CCC id=c1</div>

<div style="color:green">DDD id=d1</div>


<div style="color:blue">BBB id=b5</div>

<div style="color:maroon">CCC id=c2</div>

HTML view
AAA id=a1
BBB id=b1
BBB id=b2
AAA id=a2
BBB id=b3
BBB id=b4
CCC id=c1
DDD id=d1
BBB id=b5
CCC id=c2
XSLT stylesheet
<xsl:stylesheet version = '1.0'
     xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>

<xsl:template match="/">
     <xsl:apply-templates/>
</xsl:template>

<xsl:template match="/xslTutorial">
     <xsl:apply-templates/>
</xsl:template>

<xsl:template match="AAA">
     <div style="color:purple">
          <xsl:value-of select="name()"/>
          <xsl:text> id=</xsl:text>
          <xsl:value-of select="@id"/>
     </div>
     <xsl:apply-templates/>
</xsl:template>

<xsl:template match="BBB">
     <div style="color:blue">
          <xsl:value-of select="name()"/>
          <xsl:text> id=</xsl:text>
          <xsl:value-of select="@id"/>
     </div>
     <xsl:apply-templates/>
</xsl:template>

<xsl:template match="CCC">
     <div style="color:maroon">
          <xsl:value-of select="name()"/>
          <xsl:text> id=</xsl:text>
          <xsl:value-of select="@id"/>
     </div>
     <xsl:apply-templates/>
</xsl:template>

<xsl:template match="DDD">
     <div style="color:green">
          <xsl:value-of select="name()"/>
          <xsl:text> id=</xsl:text>
          <xsl:value-of select="@id"/>
     </div>
</xsl:template>


</xsl:stylesheet>