[xep-support] Problem with external graphic when using embedding XEP 4.2

I am attemping to generate PDF output using an external graphic. I
have a transformation that works fine using the xep assistant, but
when called from my own application, it fails, saying that

"attribute image-base-url is required but missing"

Here is the relevant bit of the XSLT that triggers the problem:

<fo:external-graphic src="url('http://images.slashdot.org/title.gif')"/>

I am not using slashdot's images, of course, but I hard-coded the
image reference to remove the XML source from the equation as I am
testing.

When I run this from the XEP assistant, I get a PDF with the slashdot
logo across the top of the page. When I call an embedded instance of
XEP using this:

target = new FOTarget(out, format);
trans = transformerFactory.newTransformer(style);
fot = new FOTransformer(trans, xepFormatter);
fot.transform(jaxpsrc, target);

(format ="pdf", jaxpsrc and style are SAXSources, xepFormatter is my
previously initialized XEP instance)

Why am I getting this error message, and why is the exact same XSL
working in XEP Assistant?

Thanks,
Greg Ludington
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Received on Tue Mar 8 18:01:52 2005