Usage of // and $ in <xsl:value-of ...

[Aravind G via .NET 247]

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--------------------------------
From: Aravind G

Hello all,

I have a peculiar situation.

Following is a small xml snippet in use

<ROOTNODE>
<SPSNODE>
<EXTERNALMESSAG E xmlns:xsi="http ://www.w3.org/2001/XMLSchema-instance">
<PHILIPSRIS>
<PERSON xmlns:dt="urn:s chemas-microsoft-com:datatypes">
<PATIENT>
<SERVICEEPISODE >
<ORDERENTRY>
<ORDER_STATUS dt:dt="string"> SC</ORDER_STATUS>
:
:
:

Through some mapping information I am able to get the element name (viz. ORDER_STATUS) in a variable say RISName.
The need is to get the Value of the element ORDER_STATUS. Since the element name is obtained dynamically, the exact path is not known during the program. Hence I am using the "//" expression suppported to reach the element of interst.

Below is the XSLT snippet used.

<xsl:variable name="RISValue" >
<xsl:value-of select="//$RISName"/>
</xsl:variable>

XSLT processor is throwing "Not a valid XPath expression".

1. Can any one kindly clarify if // and $ can be used in conjunction?
2. If there is any way the needed solution can be arrived.

Thanks in advance

Regards
Aravind

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Posted by a user from .NET 247 (http://www.dotnet247.com/)

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[Oleg Tkachenko [MVP]]

Aravind G via .NET 247 wrote:

Through some mapping information I am able to get the element name (viz. ORDER_STATUS) in a variable say RISName.
The need is to get the Value of the element ORDER_STATUS. Since the element name is obtained dynamically, the exact path is not known during the program. Hence I am using the "//" expression suppported to reach the element of interst.

Below is the XSLT snippet used.

<xsl:variable name="RISValue" >
<xsl:value-of select="//$RISName"/>
</xsl:variable>

You seems to be coding with macros too much :) No macros in XSLT. Use

<xsl:value-of select="//*[name() = $RISName]"/>

--
Oleg Tkachenko [XML MVP]
http://blog.tkachenko.com