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XPath with variables

Discuss XPath with variables in the XML Programming forum on Dev Shed.
XPath with variables XML Programming forum discussing XML and related technologies, including XUL and XSL. XML is a self-describing file format, designed for maximum compatibility between applications.

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  #1  
Old June 17th, 2004, 09:10 AM
kid23 kid23 is offline
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XPath with variables
Hi,

I'd like to make a selection of external data into XSLT, therefore, I'm using a syntax like:

<xsl:apply-templates select="document($MembersDB)//Member[Nick=$NickName]/*[name()=$FieldName]" />

This is working fine for the moment, assuming that variables have a valid content, it will select (in the file $MembersDB) the Members whose Nick = $NickName, and return the name of a given child tag.

What I'd like to do is to have this piece of code a bit more generic, and not be dependent on "Member" or "Nick"..

so instead of:

<xsl:apply-templates select="document($MembersDB)//Member/*" />

I could use something like this:

<xsl:apply-templates select="document($MembersDB)//$tag/*" />

where $tag is set using xsl:variable.

Is it possible ? Is it simply a syntax error (I tried putting $tag between curly braces too, but that didn't help) ?

Thx in advance.
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  #2  
Old August 10th, 2004, 12:09 PM
RRG RRG is offline
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NAMESPACE ALIAS & XSLT: PLS HELP ME aSAP :(:(
How do I extract using XSL aply-tempalte/template -match and other xpath expr :
1. All customers outside USA
2. Calculate Total Dep and total Wdl
3. Display customers whose AccBal is > MinBal
4. Maybe extract all Male custoemrs
5.Multiply exchangeaRate * localCurrency

Do you know if using a Namespacelike this below might help...?
But in the schema & xml do I need to declare all elements with the NS alias?
How do I create for-loop or International customers, etc with alias ns?
Kindly help me...
-
- <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:ns="http://xml.XMLCourse.edu/targetNS">
<xslutput method="html" />
- <xsl:template match="/">
- <html>
- <body>
<h3>Display International Customers</h3>
- <table border="1">
- <tr bgcolor="#9acd32">
<th>Country</th>
<th>USD Balance</th>
</tr>
- <tr>
- <td>
<xsl:apply-templates select="ns:Bank/ns:Customer" />
</td>
</tr>
</table>
</body>
</html>
</xsl:template>
- <xsl:template match="ns:Customer">
- <tr>
- <td>
<xsl:value-of select="ns:Country" />
</td>
- <td>
<xsl:value-of select="ns:AccBal" />
</td>
</tr>
</xsl:template>
</xsl:stylesheet>

I shall be ever grateful dfor any help with this ,please!
<Bank>
<Customer Code="001" Name="Arup Ray" City="Kolkata">
<!--<Account Code="001"/>
<Account Code="002"/>-->

<SSN>001-44-8888</SSN>
<Gender>Male</Gender>
<State>WB</State>
<Country>India</Country>
<AccBal>35000.00</AccBal>
<Dep>250.00</Dep>
<Dep>375.00</Dep>
<Wdl>50.00</Wdl>
<Wdl>25.00</Wdl>
<localCurrency>INR</localCurrency>
<exchangeRate>45</exchangeRate>

</Customer>


<Product ID="001" Name="Checking">


<MinBal>500.00</MinBal>
<Int>.20</Int>
<Fees>2.00</Fees>


</Product>


<Customer Code="003" Name="Paula Smith" City="Boston">
<!-- <Account Code="003"/>
<Account Code="004"/>-->

<SSN>001-22-1111</SSN>
<Gender>Female</Gender>
<State>MA</State>
<Country>USA</Country>
<AccBal>15000.00</AccBal>
<Dep>100.00</Dep>
<Dep>50.00</Dep>
<Wdl>20.00</Wdl>
<Wdl>40.00</Wdl>

</Customer>


<Product ID="002" Name="Savings">



<MinBal>5000.00</MinBal>
<Int>.20</Int>
<Fees>3.00</Fees>

</Product>

<Customer Code="002" Name="Robin Kidman" City="Cambridge">
<!--<Account Code="002"/>
<Account Code="001"/>--> <!--Customer can have 0 or more accounts-->
<SSN>001-55-7777</SSN>
<Gender>Female</Gender>
<State>BH</State>
<Country>UK</Country>
<AccBal>8000.00</AccBal>
<Dep>250.00</Dep>
<Wdl>50.00</Wdl>
<localCurrency>GBP</localCurrency>
<exchangeRate>1.5</exchangeRate>


</Customer>

<Product ID="003" Name="CD">



<MinBal>10000.00</MinBal>
<Int>.20</Int>
<Fees>4.00</Fees>


</Product>

<Customer Code="002" Name="Chris Shaw" City="Atlanta" >
<!--<Account Code="002"/>
<Account Code="003/> -->

<SSN>001-11-5234</SSN>
<Gender>Male</Gender>
<State>GA</State>
<Country>USA</Country>
<AccBal>40000.00</AccBal>
<Dep>300.00</Dep>
<Wdl>100.00</Wdl>

</Customer>


<Product ID="004" Name="IRA">



<MinBal>20000.00</MinBal>
<Int>.20</Int>
<Fees>5.00</Fees>


</Product>


</Bank>



*********
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  #3  
Old August 10th, 2004, 08:13 PM
fpmurphy fpmurphy is offline
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XPath variables represent values, they are not to quote
Michael Kay "macros that represent parts of an expression."

What you want to do is not possible in XSLT 1.0. A variable cannot be used after "/" or "//".

There are workarounds and some XSLT processors support the syntax as an extension.

Do a Web search on "XPath dynamic variable" for further information.
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