Saxon » Saxon-CE

I've tried reproducing this, using xsl:apply-templates for elements within the page.

Perhaps there's something specific you're doing with the result that is causing this error?

If you can send us a simple case (html, xml and xslt) that reproduces this, it will help narrow down the issue.

I've run the test files you sent on Opera, and - with the latest internal Saxon-CE build - I'm getting a more informative error message:

SEVERE: XPathException in invokeTransform: An empty sequence is not allowed as the value of variable $svg

To get a bit more context, I tried running this in Trace mode (included in the next Saxon-CE release), I get this:

This error is what you would expect if the expression in the $svg variable defintion returned an empty sequence (because of @as="element()@")

Looking closer at your XSLT - there are no namespace declarations for XHTML or SVG, so I added these:

@xmlns:svg="http://www.w3.org/2000/svg"

xpath-default-namespace="http://www.w3.org/1999/xhtml"@

And then changed the $svg XPath to:

<xsl:variable name="svg" select="ixsl:page()/html/body/svg:svg" as="element()"/>

This now runs with no error:

One thing to note is that I'm using the latest build of Saxon (because this build has your XHTML workaround for GWT)which is fully namespace aware, in Beta 0.1 there were probably cases where namespace issues such as those I've corrected weren't picked up.

Now this part of the XSLT runs I will check things a bit further - to check what apply-templates is actually doing here with those g elements

Right, I'm on track again - after clearing up that namespace issue which, as suspected, wasn't the root cause. I now get the same error message as you do:

Thanks, this makes perfect sense! I must confess, I ignored the title and thought circle as an empty element. What I found as a workaround

• <xsl:template match="circle" mode="initial-attr"/>

now turns out to be necessary code.