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[xsl] Re: Any way to specify diagnostic message for missing stylesheet parameter?


Subject: [xsl] Re: Any way to specify diagnostic message for missing stylesheet parameter?
From: "David Sewell dsewell@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 16 Oct 2014 13:14:25 -0000

The default parameter value is not possible when using <xsl:param required="yes">. xsl:param must be empty in that case.

On Thu, 16 Oct 2014, Vladimir Nesterovsky wrote:

You can define a default value of parameter in a way to report omission:

<xsl:param name="somevar">
 <xsl:sequence select="'default'"/>
 <xsl:message select="somevar is not specified"/>
</xsl:param>
--
VN

-----Original Message-----
From: David Sewell [mailto:dsewell@xxxxxxxxxxxx]
Sent: Wednesday, October 15, 2014 7:19 PM
To: xsl-list
Subject: Any way to specify diagnostic message for missing stylesheet
parameter?

Given a stylesheet parameter <xsl:param name="somevar" required="yes"/>,
failing to supply a parameter value at run-time results in a boilerplate
error message such as "XTDE0050: No value supplied for required parameter
somevar".

It would be helpful to be able to supply a custom error message such as
"required: somevar=[true|false|unknown]" to save the user the time it takes
to look through the code to figure out what parameter is expected. There's
no way to do this in the XSLT spec through 3.0, correct? and no common
extensions for doing it?

If not, would that be a useful feature for others, or are there reasons not
to implement something like that as an extension or enhancement?

David

--
David Sewell, Editorial and Technical Manager ROTUNDA, The University of
Virginia Press PO Box 400314, Charlottesville, VA 22904-4314 USA
Email: dsewell@xxxxxxxxxxxx   Tel: +1 434 924 9973
Web: http://rotunda.upress.virginia.edu/





-- David Sewell, Editorial and Technical Manager ROTUNDA, The University of Virginia Press PO Box 400314, Charlottesville, VA 22904-4314 USA Email: dsewell@xxxxxxxxxxxx Tel: +1 434 924 9973 Web: http://rotunda.upress.virginia.edu/


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