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Calling xsl variables and params within attribute values

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flyingzumwalt

Calling xsl variables and params within attribute values

I'm sure I've done this a million times, but now I'm suddenly getting errors. I want to store part of an XPath expression as an xsl:variable and then call it later on in my template. Normal syntax should be

<xsl:value-of select="{$my-param}"/>

... but this doesn't work. Have I missed something?

Here is an example in an XPL pipeline, using XSLT processor:

<p:config xmlns:p="http://www.orbeon.com/oxf/pipeline"

xmlns:oxf="http://www.orbeon.com/oxf/processors"

xmlns:xforms="http://www.w3.org/2002/xforms"

xmlns:xxforms="http://orbeon.org/oxf/xml/xforms">

<p:param name="instance" type="input"/>

<p:param name="data" type="output"/>

<p:processor name="oxf:xslt">

<p:input name="data" href="#instance"/>

<p:input name="config">

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"

xmlns:exist="http://exist.sourceforge.net/NS/exist"

version="2.0">

<xsl:variable name="mypath">/my/path</xsl:variable>

<xsl:template match="/">

<head>

<title>XSL Param Usage Test</title>

</head>

<body>

Variable Alone:<xsl:value-of select="$mypath"/>

Value of node pointed to by path:<xsl:value-of select="/my/path"/>

Value of node pointed to by path, accessed using variable:

<!--

<xsl:value-of select="{$mypath}"/>

-->

</body>

</html>

</xsl:template>

</xsl:stylesheet>

</p:input>

<p:output name="data" id="boo" ref="data" />

</p:processor>

</p:config>

Default Submission:

<my>

<path>myvalue</path>

</my>

Matt Zumwalt

http://flyingzumwalt.blogspot.com

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Alexander Žaťko

Re: Calling xsl variables and params within attribute values

Matt,

One way to do what you want is to use function like saxon:evaluate() to have the XSL engine evaluate the path stored in variable. Otherwise the content of the variable is treated as string. Try this:

<?xml version="1.0" encoding="UTF-8"?>

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0"

xmlns:exist="http://exist.sourceforge.net/NS/exist"

xmlns:saxon="http://saxon.sf.net/">

<xsl:variable name="mypath">/my/path</xsl:variable>

<xsl:template match="/">

<head>

<title>XSL Param Usage Test</title>

</head>

<body>

Variable Alone:<xsl:value-of select="$mypath"/>

Value of node pointed to by path:<xsl:value-of select="/my/path"/>

Value of node pointed to by path, accessed using variable:

[<xsl:value-of select="saxon:evaluate($mypath)"/>]

<!--

-->

</body>

</html>

</xsl:template>

</xsl:stylesheet>

On Nov 16, 2006, at 12:24 AM, Matt Zumwalt wrote:

I'm sure I've done this a million times, but now I'm suddenly getting errors. I want to store part of an XPath expression as an xsl:variable and then call it later on in my template. Normal syntax should be
<xsl:value-of select="{$my-param}"/>

... but this doesn't work. Have I missed something?

Here is an example in an XPL pipeline, using XSLT processor:

<p:config xmlns:p="http://www.orbeon.com/oxf/pipeline"
xmlns:oxf="http://www.orbeon.com/oxf/processors"
xmlns:xforms="http://www.w3.org/2002/xforms"
xmlns:xxforms="http://orbeon.org/oxf/xml/xforms">

<p:param name="instance" type="input"/>
<p:param name="data" type="output"/>

<p:processor name="oxf:xslt">
<p:input name="data" href="#instance"/>
<p:input name="config">
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:exist="http://exist.sourceforge.net/NS/exist"
version="2.0">
<xsl:variable name="mypath">/my/path</xsl:variable>
<xsl:template match="/">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:html="http://www.w3.org/1999/xhtml">
<head>
<title>XSL Param Usage Test</title>
</head>
<body>
Variable Alone:<xsl:value-of select="$mypath"/>
Value of node pointed to by path:<xsl:value-of select="/my/path"/>

Value of node pointed to by path, accessed using variable:




</body>
</html>
</xsl:template>
</xsl:stylesheet>
</p:input>
<p:output name="data" id="boo" ref="data" />
</p:processor>

</p:config>

Default Submission:
<my>
<path>myvalue</path>
</my>

Matt Zumwalt
http://flyingzumwalt.blogspot.com

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Ryan Puddephatt

RE: Calling xsl variables and params within attribute values

In reply to this post by flyingzumwalt

Matt,

I don't think this works, but saxon:evaluate($my-path) will work

Ryan

Ryan Puddephatt
Software Engineer

Teleflex Group - IT UK
1 Michaelson Square
Livingston
West Lothian
Scotland
EH54 7DP

e> [hidden email]
t> +44(0)1506 407 110
f> +44(0)1506 407 108
w> www.teleflex.com

From: Matt Zumwalt [mailto:[hidden email]]
Sent: 15 November 2006 23:25
To: [hidden email]
Subject: [ops-users] Calling xsl variables and params within attribute values

I'm sure I've done this a million times, but now I'm suddenly getting errors. I want to store part of an XPath expression as an xsl:variable and then call it later on in my template. Normal syntax should be
<xsl:value-of select="{$my-param}"/>

... but this doesn't work. Have I missed something?

Here is an example in an XPL pipeline, using XSLT processor:

<p:config xmlns:p="http://www.orbeon.com/oxf/pipeline"

xmlns:oxf="http://www.orbeon.com/oxf/processors"

xmlns:xforms="http://www.w3.org/2002/xforms"

xmlns:xxforms="http://orbeon.org/oxf/xml/xforms">

<p:param name="instance" type="input"/>

<p:param name="data" type="output"/>

<p:processor name="oxf:xslt">

<p:input name="data" href="#instance"/>

<p:input name="config">

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"

xmlns:exist="http://exist.sourceforge.net/NS/exist"

version="2.0">

<xsl:variable name="mypath">/my/path</xsl:variable>

<xsl:template match="/">

<html xmlns="http://www.w3.org/1999/xhtml" xmlns:html="http://www.w3.org/1999/xhtml">

<head>

<title>XSL Param Usage Test</title>

</head>

<body>

Variable Alone:<xsl:value-of select="$mypath"/>

Value of node pointed to by path:<xsl:value-of select="/my/path"/>



Value of node pointed to by path, accessed using variable:







</body>

</html>

</xsl:template>

</xsl:stylesheet>

</p:input>

<p:output name="data" id="boo" ref="data" />

</p:processor>

</p:config>

Default Submission:

<my>

<path>myvalue</path>

</my>

Matt Zumwalt

http://flyingzumwalt.blogspot.com

Alessandro Vernet

Re: Calling xsl variables and params within attribute values

Administrator

In reply to this post by flyingzumwalt

Matt,

If you have an XPath expression in a string, and you want to evaluate
it, you will need to use a Saxon extension: saxon:evaluate(). It looks
like:

<xsl:value-of select="saxon:evaluate($mypath)"/>

See more at:
http://www.saxonica.com/documentation/extensions/functions/evaluate.html

Alex

On 11/15/06, Matt Zumwalt <[hidden email]> wrote:

> I'm sure I've done this a million times, but now I'm suddenly getting
> errors. I want to store part of an XPath expression as an xsl:variable and
> then call it later on in my template. Normal syntax should be
> <xsl:value-of select="{$my-param}"/>
>
> ... but this doesn't work. Have I missed something?
>
> Here is an example in an XPL pipeline, using XSLT processor:
>
> <p:config xmlns:p="http://www.orbeon.com/oxf/pipeline"
> xmlns:oxf="http://www.orbeon.com/oxf/processors"
> xmlns:xforms="http://www.w3.org/2002/xforms"
> xmlns:xxforms="http://orbeon.org/oxf/xml/xforms">
>
>
> <p:param name="instance" type="input"/>
> <p:param name="data" type="output"/>
>
>
>
>
>
>
> <p:processor name="oxf:xslt">
> <p:input name="data" href="#instance"/>
> <p:input name="config">
> <xsl:stylesheet
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
> xmlns:exist="http://exist.sourceforge.net/NS/exist"
> version="2.0">
> <xsl:variable name="mypath">/my/path</xsl:variable>
> <xsl:template match="/">
> <html xmlns="http://www.w3.org/1999/xhtml"
> xmlns:html="http://www.w3.org/1999/xhtml">
> <head>
> <title>XSL Param Usage Test</title>
> </head>
> <body>
> Variable Alone:<xsl:value-of select="$mypath"/>
> Value of node pointed to by path:<xsl:value-of
> select="/my/path"/>
> 
> Value of node pointed to by path, accessed using variable:
>
>
> 
> 
> 
> </body>
> </html>
> </xsl:template>
> </xsl:stylesheet>
> </p:input>
> <p:output name="data" id="boo" ref="data" />
> </p:processor>
>
>
>
>
>
>
> </p:config>
>
>
>
> Default Submission:
> <my>
> <path>myvalue</path>
> </my>
>
>
>
>
> Matt Zumwalt
> http://flyingzumwalt.blogspot.com
>
>
>
> --
> You receive this message as a subscriber of the [hidden email]
> mailing list.
> To unsubscribe: mailto:[hidden email]
> For general help: mailto:[hidden email]?subject=help
> ObjectWeb mailing lists service home page: http://www.objectweb.org/wws
>
>
>

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flyingzumwalt

Re: Calling xsl variables and params within attribute values

Thanks to everyone who offered help with this one. Everything is working smoothly now.

Matt Zumwalt

MediaShelf, LLC

http://www.yourmediashelf.com

On Nov 16, 2006, at 6:48 PM, Alessandro Vernet wrote:

Matt,

If you have an XPath expression in a string, and you want to evaluate
it, you will need to use a Saxon extension: saxon:evaluate(). It looks
like:

<xsl:value-of select="saxon:evaluate($mypath)"/>

See more at:
http://www.saxonica.com/documentation/extensions/functions/evaluate.html

Alex

On 11/15/06, Matt Zumwalt <[hidden email]> wrote:

I'm sure I've done this a million times, but now I'm suddenly getting
errors. I want to store part of an XPath expression as an xsl:variable and
then call it later on in my template. Normal syntax should be
<xsl:value-of select="{$my-param}"/>

... but this doesn't work. Have I missed something?

Here is an example in an XPL pipeline, using XSLT processor:

<p:config xmlns:p="http://www.orbeon.com/oxf/pipeline"
xmlns:oxf="http://www.orbeon.com/oxf/processors"
xmlns:xforms="http://www.w3.org/2002/xforms"
xmlns:xxforms="http://orbeon.org/oxf/xml/xforms">

<p:param name="instance" type="input"/>
<p:param name="data" type="output"/>

<p:processor name="oxf:xslt">
<p:input name="data" href="#instance"/>
<p:input name="config">
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:exist="http://exist.sourceforge.net/NS/exist"
version="2.0">
<xsl:variable name="mypath">/my/path</xsl:variable>
<xsl:template match="/">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:html="http://www.w3.org/1999/xhtml">
<head>
<title>XSL Param Usage Test</title>
</head>
<body>
Variable Alone:<xsl:value-of select="$mypath"/>
Value of node pointed to by path:<xsl:value-of
select="/my/path"/>

Value of node pointed to by path, accessed using variable:




</body>
</html>
</xsl:template>
</xsl:stylesheet>
</p:input>
<p:output name="data" id="boo" ref="data" />
</p:processor>

</p:config>

Default Submission:
<my>
<path>myvalue</path>
</my>

Matt Zumwalt
http://flyingzumwalt.blogspot.com

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mailing list.
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Blog (XML, Web apps, Open Source):
http://www.orbeon.com/blog/

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