I have a requirement where i need to parse/extract a portion of xml based on certain variable which is available in same xml.

for ex:

<booklist>
    <book>
        <category>Fiction</category>
        <titleA>DaysMurder</titleA>
        <price>
            <cents>10</cents>
            <dollar>12</dollar>
        </price>
        <amount>2</amount>
    </book>
    <book1>
        <category>Fiction1</category>
        <titleA>DaysMurder1</titleA>
        <price>
            <cents>101</cents>
            <dollar>121</dollar>
        </price>
        <amount>21</amount>
    </book1>
    <book2>
        <category>Fiction2</category>
        <titleA>DaysMurder2</titleA>
        <price>
            <cents>102</cents>
            <dollar>122</dollar>
        </price>
        <amount>22</amount>
    </book2>
    <value>book2</value>
</booklist>


In the above example having list of books, i need to extract book node based on element value which appears in the end. In this case my output should look like

    <book2>
        <category>Fiction2</category>
        <titleA>DaysMurder2</titleA>
        <price>
            <cents>102</cents>
            <dollar>122</dollar>
        </price>
        <amount>22</amount>
    </book2>

please suggest a way to accomplish this thing, if some one can reply with an xslt that will be really helpful

I'm unsure exactly what you mean by 'element value which appears in the end'. Can you clarify that please. Do you mean based on the value on the <amount> element, or something else.

/- Sam Judson : Wrox Technical Editor -/

This is a poor document design. You shouldn't have book elements named <book1>, <book2>, and so on - it makes the data very hard to process. You would be much better off using attributes: <book number="1"> and so on.

However, in this case the answer isn't difficult, you just want

<xsl:template match="/">
  <xsl:variable name="t" select="booklist/value"
  <xsl:copy-of select="booklist/*[name()=$t]"/>
</xsl:template>

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

Thanks a lot for your answer. It helped us...Thanks again
Reg
aintvoguish